/unix/misc:

GDB is the GNU Project source-level debugger that let you see what is going on inside another program while it executes.

NCO (netCDF Operators) are a suite of programs known as operators. The operators facilitate manipulation and analysis of self-describing data stored in the netCDF or HDF formats.

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (note: HDF5 and old HDF versions are NOT compatible; current stable release; source)

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (documentation of current stable release)

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the current release series.

Calc - C-style arbitrary precision calculator

QtiPlot is a program for two- and three-dimensional graphical presentation of data sets and for scientific data analysis (commercial support available).

libpng is the reference library supporting the PNG graphic file format (beta version)

PostgreSQL Object-Relational Data Base Management System (DBMS), supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions. Release candidate.

MongoDB is a high-performance, dynamic-schema, document-oriented (NoSQL) database combining the best features of JSON databases, key-value stores, and RDBMSes.

Nagios is an host/service/network monitoring system to identify and resolve IT infrastructure problems

SciTE is a source code editing component (used fpr e.g. by SciTE)

SciTE is a SCIntilla based Text Editor. Scintilla itself is a source code editing component supporting syntax styling, error indicators, code completion and call tips (source code; Linux binary is named "gscite").

lftp is a command line ftp client (FTP, HTTP, ssl support, background transfer, reget, reput, ...)

Mathomatic is a portable text mode Computer Algebra System (CAS).

FOX is a C++ based Toolkit for developing Graphical User Interfaces

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Release candidate.

ImageMagick is a collection of tools and libraries to display and manipulate an image in many image formats

MySQL (SQL database server) Reference Manuals (different versions and formats; languages: en + de)

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the previous release series.

GNU M4 is an implementation of the traditional Unix macro processor.

Various Domain Name Service (DNS) utilities

Wireshark is a network traffic/protocol analyzer (old name was "ethereal")

GLib - low-level core C library used by GTK+ and GNOME. Development release.

xterm is a terminal emulator for X with ISO/ANSI color and vt220 enhancements.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the oldest maintained release series.

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Snapshot of the active development version.

libpng is the reference library supporting the PNG graphic file format (beta version)

Lzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression.

OpenVPN - a secure IP tunneling (Virtual Private Network) daemon. OpenVPN supports SSL/TLS security, ethernet bridging, TCP or UDP tunnel transport through proxies or NAT, support for dynamic IP addresses and DHCP.

VLC (VideoLAN Client) is a multimedia player for various audio and video formats (MPEG-1/2/4, DivX, MP3, Vorbis, Ogg, ...) as well as DVDs, VCDs, and various streaming protocols.

Mercurial is a Source (Version) Control Management system designed for efficient handling of very large distributed projects

The Xen hypervisor is a virtual machine monitor for x86, x86_64, IA64, PowerPC and other CPU architectures that supports execution of multiple guest operating systems in isolated environments

RPM is a powerful and mature command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating Unix software packages ("no longer Linux-centric").

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available (release candidate).

Dovecot is an IMAP and POP3 server, written with security primarily in mind.

Stunnel - Universal SSL tunnel - works as SSL encryption wrapper between remote client and local (inetd-startable) or remote server. (beta version)

OTRS (Open Ticket Request System) is a ticket request and email management system to manage customer telephone calls and e-mails.

The Unix port of OpenBSD's OpenSSH (Secure Shell)

OpenSSH Portable Release (Secure Shell)

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. Source code.

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. The amalgamation (all preprocessed C code combined into a single source file).

SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. Documentation.

ExifTool is a platform-independent Perl library plus a command-line application for reading, writing and editing meta information in image, audio and video files

Wine is an Open Source implementation of the MS Windows API on top of X, OpenGL, and Unix. Think of Wine as a compatibility layer for running Windows programs. Development release.

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Development release.

MySQL - a SQL (Structured Query Language) database server (GA release for production use)

Git- a fast version control system respectively distributed source code management tool (designed to handle absolutely massive projects like the Linux kernel)

Net-SNMP contains various tools relating to the Simple Network Management Protocol (successor of the cmu-snmp library).

vsftpd is a "secure, fast and scalable" FTP server

PDL - The Perl Data Language project aims to turn perl into an efficient numerical language for scientific computing

Sudo (su "do") allows a system administrator to delegate authority to give certain users the ability to run some commands as root or another user.

MIMEDefang uses sendmail's milter interface to intercept, inspect, and modify email messages as they travel through the sendmail server. It can be combined with other mail scanning software for spam filtering, virus scanning, etc.

Ruby is an interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). Stable 1.9 version.

XPaint is a bitmap/pixmap editing tool

Boost provides free peer-reviewed portable high-quality C++ source libraries.

ZABBIX is an enterprise-class distributed monitoring solution for servers and applications

Ruby is an interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). Stable 1.8 version.

Ruby is an interpreted scripting language for quick and easy object-oriented programming. It has many features to process text files and to do system management tasks (as in Perl). Stable 1.9 version.

Vi IMproved (vi clone) - documentation in HTML

Vim - Vi IMproved (vi clone) advanced text editor (with optional GUI)

Rsyslog is an enhanced multi-threaded syslogd with a focus on security and reliability. Among others it offers support for TCP, SSL, TLS, RELP and writing to databases. Development version V6-series.

Inkscape is a Scalable Vector Graphics editor - a powerful drawing tool using the W3C standard Scalable Vector Graphics (SVG) file format.

Amanda is a backup system designed to archive many computers on a network to a single large-capacity tape drive

Clam AntiVirus is an anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a multi-threaded daemon, a command line scanner, and an advanced tool for automatic database updating via Internet.

Maxima is a Lisp based computer algebra system (doing mathematics calculations, symbolic manipulations, numerical computations and graphics)

OpenNMS is an effort to build a fully distributed network management platform providing both enterprise and element management capabilities, using Java 2, XML/XSL and other open source projects/tools such as JBossMQ, RRDTool, Tomcat and PostgreSQL (source code; development version)

Poppler is a PDF rendering library (based on the xpdf-3.0 code base)

Asterisk is a complete PBX (Private Branch eXchange) telephony engine and telephony applications toolkit (supports Voicemail services with Directory, Call Conferencing, Interactive Voice Response and Call Queuing, ...). 1.4 series release.

Asterisk is a complete PBX (Private Branch eXchange) telephony engine, and telephony applications toolkit (supports Voicemail services with Directory, Call Conferencing, Interactive Voice Response and Call Queuing, ...). 1.6 series release (no longer supports Zaptel but only DAHDI).

Gutenprint (Gimp-Print) is a collection of very high quality printer drivers for UNIX/Linux (plugins for GIMP2, driver for CUPS and GhostScript)

Pidgin is a chat program (multi-protocol instant messaging client) which lets you log in to accounts on multiple chat networks simultaneously (old name "gaim").

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (documentation of development branch)

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (development branch)

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. It is available as a stand-alone application for data analysis and as a data mining engine which can be integrated into own products. Source code of the GPL licensed stable version.

Rsyslog is an enhanced multi-threaded syslogd with a focus on security and reliability. Among others it offers support for TCP, SSL, TLS, RELP and writing to databases. Beta version V5-series.

VILE is a text editor which optionally retains the "finger-feel" of "vi" while adding the multiple buffer and multiple window features of emacs and other editors.

ntop is a network usage monitor (based on libpcap)

Sage is a software application which covers many aspects of mathematics, including algebra, combinatorics, numerical mathematics, and calculus. It combines the power of many existing open-source packages into a common Python-based interface. Caution: Roughly 250 MB!

RapidMiner (formerly YALE) is a knowledge discovery and data mining system. Manual (German, PDF).

Bacula is a network client/server based backup program

Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Stable release.

Bugzilla is an advanced "Defect Tracking System" or "Bug-Tracking System". Latest release.

Nano is ANOther display-oriented text editor (an enhanced free clone of Pico from the Pine project)

Bison is a general-purpose parser generator.

Rsyslog is an enhanced multi-threaded syslogd with a focus on security and reliability. Among others it offers support for TCP, SSL, TLS, RELP and writing to databases.

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography (MIT implementation) - current release

The GNU C Library ("system calls" and other basic facilities such as open, malloc, printf, exit...)

LSOF - LiSt Open Files for running UNIX processes

GNU Autoconf is an extensible package of M4 macros that produce shell scripts to automatically configure software source code packages.

Octave is a high-level language for linear and nonlinear numerical computations mostly compatible with Matlab ("bleeding edge" - development version)

Octave is a high-level language for linear and nonlinear numerical computations mostly compatible with Matlab (note: Octave 3.x is significantly different from Octave 2.1)

BerkeleyDB is a module which allows Perl programs to make use of the facilities provided by Berkeley DB (version 2 or greater)

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Current release series.

Bonita is an XPDL standard compliant workflow and Business Process Management (BPM) solution

OpenVAS (Open Vulnerability Assessment System) is a network security scanner (a fork of Nessus)

PETSc: The Portable, Extensible Toolkit for Scientific Computation - a suite of data structures and routines for the scalable (parallel) solution of scientific applications modeled by partial differential equations (employs the MPI standard)

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems (preview test-release)

ParaView is a scientific data analysis and visualization application for large data sets.

GNU make utility is a tool which controls the generation of executables and other non-source files of a program from the program's source files.

Plugins for the Nagios host/service/network monitoring program

Miro is a video player and podcast client. It supports most known video files and offers sound and video, some in HD quality.

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 (formerly known as Fedora Directory Server), MIT Kerberos, NTP, and DNS.

AutoGen is automated text file generator to simplify the creation and maintenance of programs that contain large amounts of repetitious text (documentation only)

AutoGen is an automated text file generator to simplify the creation and maintenance of programs that contain large amounts of repetitious text (for e.g. for options processing)

di is a portable disk information utility, displaying everything (and more) that df does with different formats

GnuTLS (GNU Transport Layer Security Library) implements the TLS 1.1 and SSL 3.0 protocols accompanied with the required framework for authentication and public key infrastructure.

Nmap ("Network Mapper") is a utility for network exploration or security auditing (port scanner). Defcon release (BETA).

IRODS (the integrated Rule Oriented Data System) is a distributed data-management system for creating data grids, digital libraries, persistent archives, and real-time data systems.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. Binary release.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. JavaDoc and online documentation.

Groovy is an agile dynamic (scripting) language for the Java Platform. It has features similar to those of Python, Ruby, Perl, and Smalltalk. Source release.

TrueCrypt is a software system for establishing and maintaining an on-the-fly-encrypted volume (data storage device).

Wine's documentation repository. It consists of various guides and their translations.

GnuPG - The GNU Privacy Guard (tool for secure communication and data storage). GNUPG-2 - the enhanced and somewhat harder to build version (compared to GnuPG-1).

Terracotta - Clustering technology for Java ("Network Attached Memory", "Distributed Cache"; source code)

Terracotta - Clustering technology for Java ("Network Attached Memory", "Distributed Cache"; binary distribution)

QGIS (Quantum GIS) is a Geographic Information System that supports vector, raster, and database formats.

Wine is an Open Source implementation of the MS Windows API on top of X, OpenGL, and Unix. Think of Wine as a compatibility layer for running Windows programs.

LyX is an advanced document processor that produces high quality, professional output using LaTeX, an industrial strength typesetting engine, in the background.

Mono - a development and runtime environment for .NET client and server applications on Linux, Solaris, Mac OS X, Windows, and Unix.

Libgcrypt - The general purpose GNU crypto library

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Client componet.

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Server component.

OpenERP is a complete ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software. Internet client component.

Netpbm is a toolkit for conversion of images between a variety of different formats, as well as to allow a few basic image operations (a successor to Jef Poskanzer's PBMPlus package) - super stable version

NTP - the Network Time Protocol (Version 4)

Bogofilter is a learning spam mail filter using Bayesian (statistical) analysis for classification.

Postfix is a mail system (an alternative to sendmail). Release candidate.

GIMP - The GNU Image Manipulation Program

GiNaC (GiNaC is Not a CAS (Computer Algebra System)) is a C++ library for symbolic calculations.

Sympa is an electronic mailing list manager

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Feature release.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data (development version believed to be stable; documentation).

GNU Midnight Commander is a feature rich full-screen text mode file manager.

RRDtool is a high performance data logging and graphing system for time series data. ("mrtg" successor)

Python is an interpreted, interactive, object-oriented programming language (2.x documentation, HTML) Python is an interpreted, interactive, object-oriented programming language (3.x documentation, HTML)

Python is an interpreted, interactive, object-oriented programming language (2.x documentation, PDF A4) Python is an interpreted, interactive, object-oriented programming language (3.x documentation, PDF A4)

Python is an interpreted, interactive, object-oriented programming language. It incorporates modules, exceptions, dynamic typing, very high level dynamic data types, and classes.

The ROOT system - an OO framework for large scale scientific data analysis and data mining (development version)

ProFTPD - highly configurable FTP server software (with FTPS and SFTP support)

Ghostscript GNU + Aladdin PostScript interpreters

getmail retrieves messages from one or more POP3, IMAP4, or SDPS mailboxes and deliver to a maildir, mboxrd-format mbox file, or external MDA (written in Python)

OpenLDAP is a suite of the Lightweight Directory Access Protocol (v3) servers, clients, utilities, and development tools. Latest release.

GIMP - The GNU Image Manipulation Program. Development snapshot.

libpng is the reference library supporting the PNG graphic file format

libpng is the reference library supporting the PNG graphic file format

x3270 is an IBM 3270 terminal emulator for the X Window System and Windows. running over a TELNET connection, emulating either an IBM 3279 (color) or 3278 (monochrome).

xlockmore is an X11 display locker/screensaver

ICU IBM's International Components for Unicode (ICU) - C and C++ library documentation (milestone release; HTML format)

ICU IBM's International Components for Unicode (ICU) is a C and C++ library that provides robust and full-featured Unicode support on a wide variety of platforms (milestone release).

Doxygen is a source code documentation generator tool for C++, C, Java, Objective-C, Python, IDL (Corba and Microsoft flavors), Fortran, VHDL, PHP, C#, and to some extent D. Different output formats are supported.

PCRE - Perl-compatible regular expressions

Sylpheed is an X11 e-mail client (and news reader) based on GTK+.

The Wine Developers Guide (HTML format)

The Wine Developers Guide (PDF format)

The Winelib User Guide (HTML format)

The Winelib User Guide (PDF format)

The Wine User Guide (HTML format)

The Wine User Guide (PDF format)

Fityk is a general-purpose nonlinear curve-fitting and data analysis program. It allows data visualization, separation of overlapping peaks, background subtraction, data calibration and much more.

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems (now with "experimental" SMB2-support).

remind a sophisticated calendar/reminder and alarm program.

The Common UNIX Printing System (CUPS) provides a portable printing layer for UNIX operating systems using Internet Printing Protocol (IETF-IPP) as basis for managing print jobs and queues. LPD and SMB and AppSocket protocols are supported with reduced functionality.

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (demos). Current release.

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (main library code). Current release.

FFmpeg is a complete, cross-platform solution to record, convert and stream audio and video (including the audio/video codec library "libavcodec").

GNU ID Utils is a binary file containing a list of file names, a list of tokens, and a sparse matrix indicating which tokens appear in which files (for e.g. to make many text-searching tasks simpler and faster).

LibTIFF - TIFF (tag image format) library and tools

Pango is a library for laying out and rendering of text, with an emphasis on internationalization (an offshoot of the GTK+ and GNOME projects).

Trac is an enhanced wiki and issue tracking system for software development projects. It provides an interfaces to Subversion (or other version control systems).

Leafnode is a store & forward NNTP proxy for small (dialup) sites.

LibTIFF - TIFF (tag image format) library and tools

gv is an X11 ghostscript frontend (based on ghostview)

GNU libtool is a generic library support script that hides the complexity of using shared libraries behind a consistent, portable interface.

Postfix is a mail system (an alternative to sendmail)

ISC DHCP implements the "Dynamic Host Configuration Protocols" for connection to a local network (version 4.2.x, development release).

Cfengine 3 is a configuration management system for configuring and maintaining Unix-like computers (using an own high level policy language).

GNU gettext utilities - a set of tools that provides a framework to help other GNU packages produce multi-lingual messages (national language support).

syslog-ng (syslog "next generation") is a high performance, stable central logging system. Open source edition.

PLplot is a cross-platform software package for creating scientific plots. There are many langaugae bindings to the PLplot library (C, C++, Fortran, Java, Octave, Python, and many more).

The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance. Developer version.

Gcal displays month/year calendar sheets, eternal holiday and fixed date lists in many ways

GLPK (GNU Linear Programming Kit) is intended for solving large-scale linear programming (LP), mixed integer programming (MIP), and other related problems. linear programming problems by means of the revised simplex method.

amavisd-new (A Mail Virus Scanner) is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin.

Exim is a message transfer agent (MTA).

Exim is a message transfer agent (MTA). Documentation.

ViewVC is a browser interface for CVS and Subversion version control repositories.

Munin is a tool for graphing all sorts of information about one or more servers and displaying it in a web interface (requires Perl and RRDTool).

MPlayer is a Unix movie player that can play most standard video formats out of the box and almost all others with the help of external codecs.

Cdrtools - Highly portable CD/DVD/BluRay command line recording software. Recent version.

Guile is GNU's extension language library. Guile is an interpreter for Scheme, packaged as a library that you can link into your applications to give them their own scripting language (development version).

ISC DHCP implements the "Dynamic Host Configuration Protocols" for connection to a local network (version 4.1.x, current production release)

XChat is an IRC chat program (for both Linux and Windows).

OpenSSL - Open Source toolkit implementing the Transport Layer Security (TLS v1) and Secure Sockets Layer (SSL v2/v3) protocols with full-strength cryptography world-wide (successor of SSLeay)

OpenSSL - Open Source toolkit implementing the Transport Layer Security (TLS v1) and Secure Sockets Layer (SSL v2/v3) protocols with full-strength cryptography world-wide (successor of SSLeay)

R (also known as `GNU S') is a system for statistical computation and graphics.

maildrop is a mail delivery agent with filtering abilities (similar to procmail)

The Courier mail transfer agent (MTA) is an integrated mail/groupware server that provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework.

The Courier IMAP server is a scalable, enterprise IMAP server that uses Maildirs.

PDFlib - Portable C library for dynamically generating PDF files (the lite version represents a subset of the full ePDFlib product).

Unison is a file-synchronization tool for Unix and Windows. Beta version. Unison is a file-synchronization tool for Unix and Windows. Beta version (manual, PDF).

Unison is a file-synchronization tool for Unix and Windows. Beta version.

Tk is a Perl interface to Tk8.x (a Graphical User Interface ToolKit)

Dante is a circuit-level firewall/proxy (socks server).

GNU Xnee is a suite of programs that can record, replay and distribute user actions under the X11 environment.

Heimdal is a free implementation of Kerberos 5 (a system for authenticating users and services on a network).

Bazaar is a decentralized revision control system (GNU project, written in Python).

ParaView - is a scientific data analysis and visualization application for large data sets. Some data.

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data (documentation).

OpenAFS is a distributed filesystem. It offers a client-server architecture for file sharing, providing location independence, scalability and transparent migration capabilities for data. Maintenance release.

XForms is a graphical user interface toolkit for X based on the X11 Xlib library.

GTK+ , the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System (current development series)

FreeRADIUS Server Project - a high performance and highly configurable RADIUS server

XForms graphical user interface toolkit for X Window Systems (documentation, HTML).

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Oldest maintained release series.

VisIt is an interactive parallel visualization and graphical analysis tool for viewing scientific data.

MRTG - The Multi Router Traffic Grapher (generates HTML pages monitor the traffic load on network-link

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Current stable release.

Inetutils is a distribution of common networking utilities and servers (ftp, tftp, telnet, rsh, rlogin ane more ...)

Glade - a User Interface Designer for GTK+ & Gnome

PostgreSQL Object-Relational Data Base Management System (DBMS), supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions. Old stable release.

PostgreSQL Object-Relational Data Base Management System (DBMS), supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions.

PostgreSQL Object-Relational Data Base Management System (DBMS), supporting almost all SQL constructs, including subselects, transactions, and user-defined types and functions. New release.

The Advanced Bash Scripting Guide -an in-depth exploration of the art of shell scripting. Development version (PDF format; roughly 950 pages!).

Samba is an re-implementation of the Microsoft SMB/CIFS protocols for Linux/Unix systems. It provides file and print services to SMB/CIFS clients and enables interoperability between Linux/Unix servers and Windows clients.

GNU awk - pattern scanning and processing language

GNU Emacs - the extensible, customizable, self-documenting real-time display editor.

RPM is a powerful and mature command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating Unix software packages ("no longer Linux-centric").

OPeNDAP is a client/server system for making local data accessible to remote locations without regard to the local or remote storage format, architecture, or environment (see also ODC = The OPeNDAP Data Connector).

RT (Request Tracker) is a trouble ticketing system.

Fetchmail is a full-featured, remote-mail retrieval and forwarding utility. It supports POP2, POP3, RPOP, APOP, KPOP, all flavors of IMAP, ETRN, ODMR, and even IPv6 and IPSEC.

ooRexx (Open Object Rexx) is a free implementation of Object Rexx. Object Rexx is an enhancement of the classic Rexx interpreter; a full-featured programming language with a human-oriented syntax.

diffutils - GNU diff, diff3, sdiff and cmp utilities

Open MPI - A High Performance Message Passing Library. Open MPI is a project combining technologies and resources from several other projects (FT-MPI, LA-MPI, LAM/MPI, and PACX-MPI) in order to build the best MPI library available.

HylaFAX+ is a system for sending and receiving facsimiles as well as for sending alpha-numeric pages (fax server).

GLib - low-level core C library used by GTK+ and GNOME.

GTK+ ,the GIMP Toolkit, is a library for creating graphical user interfaces for the X Window System

GCC - The GNU Compiler Collection is an integrated GNU compiler system for C, C++, Objective C, Chill, Fortran and Java (GCJ). Previous release series.

Claws Mail is an email client (and news reader): Extra Plugins (like an RSS aggregator, calendar, or laptop LED handling)

Claws Mail is an email client (and news reader), based on GTK+ (previously known as Sylpheed-Claws)

help2man is a tool for automatically generating simple manual pages from the --help and --version output of programs.

GNU Find Utilities are basic directory searching utilities: find, locate, uodatedb and xargs Development version.

ICU - IBM's International Components for Unicode (ICU) is a C and C++ library that provides robust and full-featured Unicode support on a wide variety of platforms (stable release).

ICU IBM's International Components for Unicode (ICU) - C and C++ library documentation (stable release; HTML format)

zlib is a general purpose data compression library

VM (aka View Mail) is a mail reader that runs inside GNU Emacs and XEmacs (supports POP and IMAP).

bochs is a portable open source IA-32 (x86) PC emulator of the Intel x86 CPU, common I/O devices, and a custom BIOS. Bochs is capable of running most Operating Systems inside the emulation including Linux, DOS, Windows 95/98, NT/2000/XP or Vista.

ne - The nice editor

GNU Core Utilities are the basic file, shell and text manipulation utilities of the GNU Operating System.

DataFinder is is a light-weight tool for managing large sets of scientific and technical data (a variety of data storage interfaces are supported e.g. WebDAV, FTP, GridFTP, OpenAFS, or TSM).

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. Scilab contains hundreds of built-in mathematical functions, sophisticated data structures (including polynomials, rationals, linear systems, lists, etc...), a high-level interpretor and a macro language, and excellent graphics.

GNU SASL is an implementation of the Simple Authentication and Security Layer (SASL). Development version.

The Festival Speech Synthesis System

IMAL (Image Analysis and Measurement Lab) - a scientific image analysis program that allows you to create, edit, analyze, and produce color prints of images (formerly tnimage).

Subversion is a version control system (CVS replacement)

strace is a diagnositic, instructional and debugging tool that traces and decodes system calls on Linux, SunOS 4, SysVr4, SunOS 4, Solaris2, and Irix5 platforms.

Gifsicle is a UNIX command-line tool for creating, editing, and getting information about GIF images and animations.

LibNcFTP: is a FTP client library to build custom applications that use the File Transfer Protocol (FTP).

XScreenSaver is a large collection of screen savers and also the framework for blanking and locking the screen.

Lzip is a lossless file compressor based on the LZMA algorithm. It decompresses almost as fast as gzip and compresses better than bzip2, but requires more memory and time during compression.

NcFTP is a set of application (client) programs implementing the File Transfer Protocol (FTP).

lesspipe is an input filter for the pager "less" to view files with binary content, compressed files, archives and files contained in archives.

tcpdump is a tool for network monitoring and data acquisition

libpcap is a packet filter library used by tools like tcpdump.

Stunnel - Universal SSL tunnel (works as SSL encryption wrapper) between remote client and local (inetd-startable) or remote server.

GNU grep prints lines containing a match to a specified pattern.

NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.

DeleGate - a multi-purpose application level gateway, or a proxy server. DeleGate mediates communication of various protocols (HTTP, FTP, NNTP, SMTP, POP, IMAP, LDAP, Telnet, SOCKS, DNS, etc.), applying cache and conversion for mediated data, controlling access from clients and routing toward servers (stable version)

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (main library code).

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interactive 3D graphics (demos).

Coda - a distributed file system like NFS and AFS

ATK is a API (toolkit) for GNOME/GTK+ Accessibility

"MATLAB-like" matrix math programming language

GtkExtra is a widget set complementary to GTK+ for creating GUI's for the X Window System (scientific graphics, ...)

GNU SASL is an implementation of the Simple Authentication and Security Layer (SASL).

ZABBIX is an enterprise-class distributed monitoring solution for servers and applications (previous stable version)

INN (InterNetNews) is a complete Usenet system. It includes innd, an NNTP server, and nnrpd, a newsreading server.

LAME is a high quality MPEG Audio Layer III (MP3) encoder.

Python is an interpreted, interactive, object-oriented programming language (3.x documentation, HTML)

Python is an interpreted, interactive, object-oriented programming language (3.x documentation, PDF A4)

Python is an interpreted, interactive, object-oriented programming language. It incorporates modules, exceptions, dynamic typing, very high level dynamic data types, and classes. Caution: 3.x is incompatible with 2.x.

GRASS (Geographic Resources Analysis Support System) is a raster- and vector-based GIS, image processing system, graphics production system and spatial modeling system (release candidate of next stable version).

SpamAssassin is a mail filter that uses a wide range of heuristic tests on mail headers and body text to identify "spam" (also known as unsolicited commercial email) incl. Bayesian (statistical) spam filter and several internet-based realtime blacklists.

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems (bug fix release).

The Advanced Bash Scripting Guide - an in-depth exploration of the art of shell scripting (HTML).

The Advanced Bash Scripting Guide - an in-depth exploration of the art of shell scripting (PDF format; roughly 950 pages!).

Pure-FTPd is a "fast", "standard-conformant" FTP server.

Gnuplot is a portable command-driven interactive function plotting program (documentation; PDF format).

Gnuplot is a portable command-driven interactive function plotting program.

Yodl - Extensible document language

Expect performs programmed dialogue with other interactive programs for automating interactive applications.

GSL (GNU Scientific Library) is a numerical library for C and C++ programmers.

GNU Tar archiving utility

GNU cpio, a program to manage archives of files

Aegis is a transaction-based software configuration management system.

*Extrema is visualization and data analysis tool for researchers

GNU GRUB 2 - a multiboot boot loader (development version)

LaTeX2rtf is a LaTeX to RTF converter.

ncview is a X11 visual browser for netCDF data format files

GNU shar utilities (shar, uuencode, remsync) prepare data for sending via e-mail.

GNU Binutils are a collection of binary tools. The main ones are "ld" the GNU linker and "(g)as" the GNU assembler.

TAU (Tuning and Analysis Utilities) is a portable profiling and tracing toolkit for performance analysis of parallel programs written in Fortran, C++, C, Java and Python.

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography (MIT implementation) - maintenance release

GLPI - IT and Asset Management Software (Information Resource-Manager)

Mtools is a collection of utilities to access MS-DOS disks from Unix without mounting them.

XCircuit is a X11 program for drawing publishable-quality electrical circuit schematic diagrams and related figures. It can also be used as a generic drawing program. Development release.

xmail is an internet and intranet mail server featuring an ESMTP server, POP3 server, finger server, TLS support for SMTP and POP3 (both server and client side), SMTP authentication and many other features

Petidomo is a small and efficient mailing list manager

JCIFS is a client library that implements the CIFS/SMB networking protocol in 100% Java (CIFS is the standard file sharing protocol on the Microsoft Windows platform).

ProFTPD - highly configurable FTP server software (with FTPS support)

Common C++ 2 is a C++ framework offering portable support for threading, sockets, file access, daemons, persistence, serial I/O, XML parsing, and system services.

MPICH2 is an all-new implementation of MPI (Message Passing Interface) that is intended to support research into the implementation of both MPI-1 and MPI-2.

NUT (Network UPS Tools) - monitoring and administering UPS (Uninterruptible Power Supply) and PDU hardware

cairo is a 2D vector graphics library with support for multiple output devices (X11, Windows-API Win32, image buffers and other experimental backends like PostScript and PDF).

AUCTEX is an extensible package for writing and formatting TeX files in GNU Emacs and XEmacs.

GNU Electric is a sophisticated electrical CAD system that can handle many forms of VLSI circuit design (written in Java).

Koha is a Integrated Library System (ILS)

GNU Units converts quantities expressed in various scales to their equivalents in other scales.

OTRS (Open Ticket Request System) is a ticket request and email management system to manage customer telephone calls and e-mails.

XCircuit is a X11 program for drawing publishable-quality electrical circuit schematic diagrams and related figures. It can also be used as a generic drawing program.

pilot-link is a suite of tools used to connect your Palm handheld with Unix, Linux, and any other POSIX-compatible machines.

GMP (GNU Multiple Precision) is a library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating point numbers. Performance release.

PARI/GP is a computer algebra system designed for fast computations in number theory (factorizations, algebraic number theory, elliptic curves...), but also contains a large number of other mathematical functions.

XRN a X News reader (using NNTP)

GNU Indent changes the appearance of a C program by inserting or deleting whitespace.

GNU enscript - convert text files to PostScript, HTML, RTF, ANSI, and overstrikes

Nmap ("Network Mapper") is a utility for network exploration or security auditing (port scanner).

Graphviz - a set of graph drawing tools and libraries

MySQL - a SQL (Structured Query Language) database server ("old" production release)

ePiX, a collection of batch utilities that, creates mathematically accurate figures, plots, and movies using easy-to-learn syntax. The output is expressly suitable for use with LaTeX. Manual and sample files only.

ePiX, a collection of batch utilities that, creates mathematically accurate figures, plots, and movies using easy-to-learn syntax. The output is expressly suitable for use with LaTeX.

file determines file type (via magic file)

GNU Gzip is a data compression program

Samba is an re-implementation of the Microsoft CIFS/SMB protocols for UNIX systems (alpha version; with Active Directory support).

GMT - The Generic Mapping Tools for manipulating geographic and Cartesian data sets

GMP (GNU Multiple Precision) is a library for arbitrary precision arithmetic, operating on signed integers, rational numbers, and floating point numbers. Stable release.

Regina is a Rexx interpreter (an easy to use but powerful programming language).

BASH - GNUs Bourne Again Shell

GNU Readline library - get a line from a user with editing

rsync is a fast incremental file-copying tool for bringing remote (and local) files into sync.

GNU patch takes a patch file (generated by the diff program) and produces according patched versions of the affected files.

rxvt-unicode is a clone of the terminal emulator rxvt

HylaFAX is a system for sending and receiving facsimiles as well as for sending alpha-numeric pages (fax server).

Sendmail is a general purpose email routing facility that supports many kinds of mail-transfer and mail-delivery methods

FLTK (Fast Light Tool Kit) - a cross-platform C++ GUI toolkit for UNIX/Linux (X11), Microsoft Windows, and MacOS X.

TIN is a threaded NNTP and spool based UseNet newsreade ("unstable" version)

XBMC is a software media player and entertainment hub for digital media that plays almost all popular audio and video formats around.

Mailman - The GNU Mailing List Management System (requires Python 2.4 or later)

Oracle Berkeley DB - high performance embeddable database engine (with AES encryption)

Oracle Berkeley DB - high performance embeddable database engine (without cryptography)

Cyrus IMAP (Internet Message Access Protocol) Server. Latest stable/current release.

OpenLDAP is a suite of the Lightweight Directory Access Protocol (v3) servers, clients, utilities, and development tools. Stable Release.

Spring Framework is an application framework for the Java platform and .NET Framework (community edition)

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. English help file in javaHelp format.

Scilab is a matrix-based scientific software package resembling Matlab and Xmath. English help file in PDF format.

Free Pascal (aka FPK Pascal) is a 32-bit/64-bit pascal compiler for different platforms. The language and the runtime library are almost compatible with Turbo Pascal 7.0 and recent Delphi releases (with the documentation and all necessary tools to build the official releases).

JED is a text editor (syntax highlighting, extensible in the C-like S-Lang scripting language).

FOX is a C++ based Toolkit for developing Graphical User Interfaces (development version)

BEYE (Binary EYE) is a portable, advanced viewer of binary files with built-in editor for binary, hexadecimal and disassembler modes. (project name was changed from BIEW into BEYE)

star - a fast tar archiver with many improvements to other tar implementations (including gnu tar)

GNU Automake is a Makefile generator (input Makefile.am, output Makefile.in; intended for use with autoconf)

S-Lang is a multi-platform programmer's library supporting display/screen management, keyboard input, keymaps, and so on.

argus - Audit Record Generation and Utilization System (a generic IP network transaction auditing and management tool)

argus - Audit Record Generation and Utilization System (a generic IP network transaction auditing and management tool). Programs that read, parse and process Argus data.

The glibc ports repository, an add-on for the GNU C Library (glibc). It contains code that is not maintained in the official glibc source tree.

Tk v8.5 (X11 toolkit implemented with the Tcl scripting language). Latest stable release.

Tcl v8.5 (tool command language). Latest stable release.

Tcl v8.5 (HTML documentation).

Xlib base 2-D drawing facility under X11 (also a hyper-graphics browser on the WWW)

gif2png is a GIF to PNG graphics file converter (preserving all graphic information, including transparency).

txt2pdf is a converter from text files to PDF format files (requires perl5; shareware)

OpenNTPD is a free, easy to use implementation of the Network Time Protocol (NTP) - OpenBSD OpenNTPD

Shows the ps listing as a tree

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data (note: HDF5 and old HDF versions are NOT compatible; old stable release)

PCB is an interactive printed circuit board editor for the X11 window system. PCB can produce industry standard RS-274X and Excellon NC-Drill format output for submission to board manufacturers.

Scala is a general purpose programming language designed to express common programming patterns in a concise, elegant, and type-safe way. It smoothly integrates features of object-oriented and functional languages, enabling Java and other programmers to be more productive.

The Lazarus IDE is a visual programming environment for the FreePascal Compiler (fpc). It supports the creation of self-standing graphical and console applications and runs on Linux, FreeBSD, MacOSX and Windows.

Qpopper is a POP3 server (enhanced Berkeley Post Office Protocol Server including TLS/SSL). Beta version.

Qpopper is a POP3 server (enhanced Berkeley Post Office Protocol Server including TLS/SSL)

Security patch for the PDF viewer release xpdf-3.02.tar.gz (Note: the patches are separate; you'll need to apply the pl1, pl2, pl3, and pl4 patches, in that order)

PSPP is a program for statistical analysis of sampled data.

FreeMat is a free environment for rapid engineering and scientific prototyping and data processing (similar to MATLAB and GNU Octave). It provides visualization, image manipulation, and plotting as well as parallel programming.

dictd is a client/server software implementing the Dictionary Server Protocol (DICT)

Qt is a comprehensive C++ application development framework. It includes a class library and tools for cross-platform development and internationalization. It simplifies the task of writing and maintaining GUI applications (open source edition, for Linux/X11).

GNU plotutils produce 2D plots in a variety of formats, built around an enhanced libplot C/C++ function library.

Net-SNMP contains various tools relating to the Simple Network Management Protocol (successor of the cmu-snmp library).

TRE is a POSIX compliant regexp matching library that supports for e.g. approximate (fuzzy) matching (includes a version of the "agrep" tool).

FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 (formerly known as Fedora Directory Server), MIT Kerberos, NTP, and DNS.

The GNU Mailutils is a protocol-independent mail framework containing a POP3 server, an IMAP4 server, a Sieve mail filter, a POSIX `mailx' client, and a collection of other tools.

Cyrus IMAP (Internet Message Access Protocol) Server. Latest legacy release.

GnuPG - The GNU Privacy Guard (tool for secure communication and data storage). GnuPG-1 - the well known and portable standalone version".

dxpc is an X protocol compressor designed to improve the speed of X11 applications run over low-bandwidth links.

libsigc++ implements a typesafe callback system for standard C++ (used by gtkmm to wrap the GTK+ signal system).

Perl (Practical Extraction and Report Language) is a high-level, general-purpose, interpreted, dynamic programming language. Previous stable release.

Cyrus SASL (Simple Authentication and Security Layer) API implementation (see RFC 2222).

Grepmail - search for emails in a normal or compressed mailbox using a regular expression or date constraint (Perl)

pstoedit translates PostScript and PDF graphics into other vector formats.

Re-alpine is a fork of Alpine (the "pine" successor) - basically a screen-oriented message-handling tool.

Open Babel is a chemical toolbox designed to speak the many languages of chemical data. It's an open, collaborative project allowing anyone to search, convert, analyze, or store data from molecular modeling, chemistry, solid-state materials, biochemistry, or related areas.

SARA (Security Auditor's Research Assistant) - a network security analysis tool. Last release.

omniORN is a robust high performance CORBA ORB for C++ and Python (CORBA = Common Object Request Broker Architecture).

XaoS is a fast portable real-time interactive fractal zoomer.

FFTW is a collection of fast C routines for computing the discrete Fourier transform (DFT) in one or more dimensions. It includes complex, real, symmetric, and parallel transforms, and can handle arbitrary array sizes efficiently

Analyzes a collection of C source files and prints a graph, charting control flow within the program

Tcsh is a version of the Berkeley C-Shell, with the addition of: A command line editor, command and file name completion, listing, ...

Framewave is a collection of popular image and signal processing routines designed to accelerate application development, debugging, and optimization on x86-class processor platforms (derived from the AMD Performance Library; source code).

Celestia is a real-time space simulation that lets you experience our universe in three dimensions (OpenGL-based).

less is a file pager (a program that displays text files similar to "more" or "pg")

Guile is GNU's extension language library. Guile is an interpreter for Scheme, packaged as a library that you can link into your applications to give them their own scripting language.

DNU libiconv is a character set conversion library (using Unicode).

OpenDS Directory Server, a free and comprehensive next generation (LDAP) directory service (Java)

Unison is a file-synchronization tool for Unix and Windows Unison is a file-synchronization tool for Unix and Windows (manual, PDF)

Unison is a file-synchronization tool for Unix and Windows

GNU sed - stream editor

Query, download and build perl modules from CPAN (Comprehensive Perl Archive Network) sites

amavisd-new (A Mail Virus Scanner) is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin.

Xlogmaster is a tool to monitor logfiles & hardware status (uses GTK+).

HDF5 (NCSA's Hierarchical Data Format 5) - a library and file format for storing scientific data: tutorial

A Perl script indenter and beautifier

A mail client-reader (pop3, mailcap, and color support) - development version

h5utils is a set of utilities for visualization and conversion of scientific data in the free, portable HDF5 format.

netperf+ is a network performance benchmark (TCP/UDP/DLPI/Sockets/SCTP).

GNU Find Utilities are basic directory searching utilities: find, locate, uodatedb and xargs

The Visualization ToolKit (VTK) Documentation (man pages; HTML)

The Visualization ToolKit (VTK) is an software system for 3D computer graphics, image processing, and visualization. It consists of a C++ class library, and several interpreted interface layers including Tcl/Tk, Java, and Python.

The Visualization ToolKit (VTK) Data (examples and tests)

Zsh is a powerful UNIX command interpreter (shell).

Zsh is a powerful UNIX command interpreter (shell). Documentation.

IRC (Internet Relay Chat) client

The OSF/Motif Clone ... (source)

Converts files from EPS format (Encapsulated PostScript) to some popular image formats (using GhostScript).

XEmacs (an alternative to GNU Emacs) is a highly customizable open source text editor and application development system (beta version).

Cyrus SASL (Simple Authentication and Security Layer) API implementation (see RFC 2222).

sK1 is an illustration program that supports professional publishing features, such as CMYK color, separations, ICC color management and press-ready PDF output (a fork of Sketch 0.6.15).

A text screen based source browsing tool (C, C++)

FElt is a finite element analysis system.

Xplanet displays rendered image of the earth or another planet (user supplied maps; requires the imlib library)

RPM is a powerful and mature command-line driven package management system capable of installing, uninstalling, verifying, querying, and updating Unix software packages ("no longer Linux-centric").

LAPACK - Linear Algebra PACKage. A transportable library of Fortran 77 subroutines for solving the most common problems in numerical linear algebra: systems of simultaneous linear equations, least-square solutions of linear systems of equations, eigenvalue problems, and singular value problems.

Security patch for the PDF viewer release xpdf-3.02.tar.gz (see also pl1, pl2 and pl4)

Cfengine 2 is language based tool specifically designed for configuring and maintaining BSD and System-5-like operating systems (workstations) attached to a TCP/IP network.

TAU (Tuning and Analysis Utilities) is a portable profiling and tracing toolkit for performance analysis of parallel programs written in Fortran, C++, C, Java and Python. User's guide (PDF).

A module which allows Perl programs to make use of the facilities provided by Berkeley DB version 1.

Logging and access control in tcp wrapper style for rlogind, rshd, login, rexecd, ftpd, telnetd, ...

An enhanced, extended, and portable implementation of the Berkeley LPR print spooler functionality (LPRng "Patrick Powell")

Universal Print Filter for PostScript and HP printers, as well as the usual 'dumb' printers (for BSD based print spoolers, for e.g. used by LPRng)

The Network Audio System (NAS)

TightVNC - an enhanced version of VNC (Virtual Network Computing), allowing remote network access to graphical desktops (stable version)

GNU Interactive Tools (file system browser, process viewer/killer, hex/ascii file viewer)

The Xemacs Sumo Tarball - a big collection of XEmacs lisp packages (roughly 35 MB!)

The ATLAS (Automatically Tuned Linear Algebra Software) project is an ongoing research effort focusing on applying empirical techniques in order to provide portable performance.

GNU Typist - a typing tutor

ELS is an Enhanced LS look-alike with many additional features

The Xemacs Sumo Tarball - a big collection of XEmacs lisp packages for Mule (MULtilingual Enhancement to GNU Emacs).

Data Display Debugger (DDD), a common graphical front-end for command-line debuggers such as GDB, DBX, WDB, Ladebug, JDB, XDB, the Perl debugger, or the Python debugger

PVM (Parallel Virtual Machine), a software system that enables a collection of heterogeneous computers to be used as a coherent and flexible concurrent computational resource.

A file distributing tool (newer Windows only versions may run under Wine).

Babel is a language interoperability tool intended for use by the high-performance scientific computing community that supports the Scientific Interface Definition Language (SIDL) for the language-independent declaration of interfaces associated with scientific software packages (latest development release).

GNU groff document formatting system

An eXtensible Open Router Platform for IPv4 and IPv6. The supported protocols are currently BGP, RIP, OSPF, PIM-SM, and IGMP/MLD.

A tool and library for differential compression (supports VCDIFF encoding and decoding).

A command line SMTP client supporting attachments, SMTP authentication, encryption, personalized signatures, ...

Pike is an interpreted, high-level, cross-platform, dynamic programming language (syntax similar to Java and C)

XEmacs (an alternative to GNU Emacs) is a highly customizable open source text editor and application development system (current version).

MAVERIK Virtual Reality demos

MAVERIK is a system for managing graphics and interaction in Virtual Reality applications. It is designed to address the challenges of highly interactive virtual environments containing many objects with complex geometry (using either Mesa or OpenGL to perform rendering).

Tcl v8.6 (HTML documentation). Development version.

Tcl v8.6 (tool command language). Development version.

Tk v8.6 (X11 toolkit implemented with the Tcl scripting language). Development version.

GANTT project - Gantt chart based project scheduling and management tool.

UW IMAP Toolkit Environment including sources for imapd server, pop2 and pop3 servers, and c-client library

GNU Radius - a suite of programs for performing remote user authentication and accounting services (using RADIUS protocol).

GSL (GNU Scientific Library) is a numerical library for C and C++ programmers.

... a collection of almost obsolete or out-dated software archives

A program that generates function prototypes and variable declarations from C source code

The OpenJPEG library is an open-source JPEG 2000 codec written in C language.

A table/matrix widget extension to Tcl/Tk

Erlang/OTP is a development environment for building distributed real-time high availability systems. Erlang is a general-purpose programming language and runtime environment. OTP (Open Telecom Platform) is a large collection of libraries for Erlang to do everything from compiling ASN.1 to providing a WWW server. Source code.

Erlang/OTP is a development environment for building distributed real-time high availability systems. Erlang is a general-purpose programming language and runtime environment. OTP (Open Telecom Platform) is a large collection of libraries for Erlang to do everything from compiling ASN.1 to providing a WWW server. Documentation (HTML)

The ncurses (new curses) library is a freeware emulation of System V Release 4.0 curses

joe (Joe's Own Editor) with a GNU-Emacs imitation (key-sequences are reminiscent of WordStar and Turbo-C)

A file distributing tool (newer Windows only versions may run under Wine).

MySQL GUI Tools Bundle (MySQL Administrator, MySQL Query Browser, MySQL Migration Toolkit, MySQL Workbench)

RealVNC (Virtual Network Computing) Free Edition for Unix/Linux - cross-platform remote control between Windows and Unix/Linux computers (full source code to both Viwer and Server)

iRealVNC (Virtual Network Computing) Free Edition for Linux (x86) - cross-platform remote control between Windows and Unix/Linux (installable packages including Viewer, XFree86 module, stand-alone Server and x0vncserver).

A document formatting system (producing plain text, PostScript or PDF)

A document formatting system (producing plain text, PostScript or PDF)

GIMP User Manual (written for the GIMP Help Browser, but can produce help pages for other formats as well).

OpenProj is an open source project management solution intended as a complete desktop replacement to commercial software like for e.g. Microsoft Project (Java sources).

OpenProj is an open source project management solution intended as a complete desktop replacement to commercial software like for e.g. Microsoft Project (Java binaries).

An NNTP based news reader (using S-Lang library)

GNU's hypertext documentation language (development version)

Scripts that scan a Unix system looking for security problems

V.E.R.A Virtual Entity of Relevant Acronyms (shareware?)

PDCurses is a multiple platforms curses library implementing most of the functions available in X/Open and System V R4 curses.

A freely available and fully compliant implementation of the CORBA standard (Common Object Request Broker Architecture) that enables software components written in multiple computer languages and running on multiple computers to work together.

A highly effective data compression algorithm for bi-level high-resolution images

Alpine/Pico/Pilot/Web Alpine/Imapd distribution - basically a screen-oriented message-handling tool (the "pine" successor)

A program-package dedicated to easy CD creation. It combines command line tools like "cdrecord", "cdda2wav", and "mkisofs" into a graphical user interface.

A fast, light-weight, embeddable scripting language designed for extending applications

GGobi is an visualization program for exploring high-dimensional data.

ncview is a X11 visual browser for netCDF data format files

Show full path of commands

Heirloom mailx is a mail user agent (derived from Berkeley Mail) with MIME extensions (info: formerly known as "nail")

SmokePing is a network latency logging and graphing system (using MRTG)

shtool is a compilation of small but very stable and portable shell scripts into a single shell tool.

An ODBC 3.5x (Open Database Connectivity) compliant driver for MySQL database server ("MyODBC")

A Java-based portable and customizable network directory management system (a kind of metadirectory system supporting NIS, DNS, Netinfo, LDAP ...) - Release 2.0

ICU IBM's International Components for Unicode (ICU) - user guide (PDF format and other)

Swatch (Simple WATCHdog) activly monitors log files produced by UNIX's syslog facility.

NetCDF (network Common Data Form) is a set of software libraries and machine-independent data formats that support the creation, access, and sharing of array-oriented scientific data.

Icecast is an internet streaming audio system.

nmh (new MH) is an electronic mail handling system.

GRACE - GRaphing, Advanced Computation and Exploration of data (a WYSIWYG 2D plotting tool, a descendant of and replacement for ACE/gr respectively xmgr)

The Common Data Format (CDF) is a self-describing data format for the storage and manipulation of scalar and multidimensional data in a platform- and discipline-independent fashion.

SNIPS (Systems & Network Integrated Polling Software) is a rewrite of the NOCOL network monitoring package (now with RRDtool integration)

Concurrent Versions System - a front end to the rcs revision control system ("stable release")

Reports system statei including a list of the top cpu using processes

An enhanced, extended, and portable implementation of the Berkeley LPR print spooler functionality (LPRng SourceForge Project)

A real-time data compression library

GRASS (Geographic Resources Analysis Support System) is a raster- and vector-based GIS, image processing system, graphics production system and spatial modeling system (technology preview release, testing version).

A multiwindow mouse-based text editor (X11) with a built-in browser for C functions and C++ classes, methods, files etc...

Tcl v8.4 (HTML documentation)

Tcl v8.4 (tool command language. Previous stable release.

Tk v8.4 (X11 toolkit implemented with the Tcl scripting language). Previous stable release.

A More Intelligent Ispell (spell checker)

Personal Archival E-mail (requires PostgreSQL)

Gnus is the advanced, self-documenting, customizable, extensible unreal-time newsreader for GNU Emacs.

Preview .dvi files (TeX)

A full-screen character mode text editor based on the VM/CMS editor XEDIT

Tix, the Tk Interface eXtension, is a powerful set of user interface components that expands the capabilities of your Tcl/Tk and Python applications.

A block-sorting file compressor

Aegis is a transaction-based software configuration management system. Reference manual (PDF).

FreeRADIUS Client is a framework and library for writing RADIUS clients

Aegis is a transaction-based software configuration management system. User guide (PDF).

The IANA /etc files package ("services" and "protocols")

GNU Bayonne 2 is a second generation telephony application server with a special focus on SIP. Release candidate.

Reports system statei including a list of the top cpu using processes

A package for Tcl 8.x that allows you to load and interact with the Java VM

Jacl (Java Command Language) is a 100% Java implementation of Tcl 8.x. Binary distribution.

The source distribution contains all of the Java files used to create Jacl. This is useful for those who wish to tightly integrate Jacl with their Java applications or for those who wish to help with the porting effort.

flex: The Fast Lexical Analyzer

Q is an extensible functional programming language based on the term rewriting calculus. Q may be useful for scientific programming, and also as a sophisticated kind of desktop calculator.

The Hoard memory allocator is a drop-in replacement for malloc() that can improve application performance, especially for multithreaded programs running on multiprocessors (hint: newer releaseis now part of the HeapLayers package).

Qt - a multi-platform GUI software toolkit. It simplifies the task of writing and maintaining GUI (graphical user interface) applications. Qt is written in C++ and is fully object-oriented (free edition).

Qt - a multi-platform GUI software toolkit. It simplifies the task of writing and maintaining GUI (graphical user interface) applications. Qt is written in C++ and is fully object-oriented (free edition, for X11 only).

Automatic screen locking after period of inactivity

ASCII to PostScript converter with pretty-printing capabilities

A problem reporting and tracking system (requires GTK 2.2.x and PostgreSQL v7.3.x)

The PRepS Tools package contains the server side scripts used to create and update PRepS (a problem reporting system) databases and the libpreps library.

A setuid-root program that offers restricted setuid-root access to executables, adjustable on a per-program and per-user basis (like sudo) and a relatively secure environment for scripts

Babel is an IDL-based interoperability tool specific to engineering and scientific applications (users guide; PDF format).

A backbone news transit system, designed to replace INN on backbone machines.

GRASS (Geographic Resources Analysis Support System) is a raster- and vector-based GIS, image processing system, graphics production system and spatial modeling system.

TkDiff is a graphical "diff" utility (compares two files).

GNU MARST - Algol-to-C Translator

A quick database manager (an alternative for DBM or its compatibles, NDBM and GDBM)

Security patch for the PDF viewer release xpdf-3.02.tar.gz (see also pl1 and pl3, pl4 patches)

GNU awk - pattern scanning and processing language GNU awk - pattern scanning and processing language. Documentation (PostScript).

GNU awk - pattern scanning and processing language GNU awk - pattern scanning and processing language. Documentation (DVI).

Yacas - Yet Another Computer Algebra System

Prints wordy and commonly misused phrases, analyses surface characteristics of a document.

A graphical Interface for the cvs client commandline tool on the Unix, Windows and Mac OS X platform (old name: LinCVS). Hint: You may look for newer versions 2.x that have another license and are no longer freely distributable.

PIKT (Problem Informant/Killer Tool) is a cross-categorical, multi-purpose software for monitoring and configuring computer systems, administering networks, and organizing system security.

Browse or page through a text file

LSH - a GNU implementation of the Secure Shell protocols (ssh)

Elm ME+ is an interactive screen-oriented mail system, Millennium Edition.

A folding editor

An interactive geometry viewing program

GNU libavl is a library in ANSI/ISO C for manipulation of binary trees and balanced binary trees (to find a particular item in an ordered data set)

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems (stable version).

Security patch for the PDF viewer release xpdf-3.02.tar.gz (see also pl2, pl3, pl4 patches)

A tool for statically checking C programs for security vulnerabilities and coding mistakes (successor to LCLint).

The reference library for MNG, the animation extension to the popular PNG format

iSelect is a (n)curses-based tool for interactive line selection in an ASCII file via a full-screen terminal session.

plan is a calendar and day planner (requires X/Motif)

An improved Whois client

GNU General Public License - Version 3, 29 June 2007 (plain text format)

GNU Lesser General Public License - Version 3, 29 June 2007 (formerly known as Library GPL; plain text format)

ZMailer - SMTP Mail Transfer Agent (MTA) (intended for gateways or mail servers that have extreme demands on the abilities of the mailer)

GNU General Public License - Version 2, June 1991 (plain text format)

A C Foundation Library that simplify systems software development on System V UNIX (includes routines for memory management, string parsing, filesystem traversal, subprocess execution, I/O, ...)

Send and receive faxes using a class 2.0 or 2 faxmodem (with voice call handling)

GANTT project - Gantt chart based project scheduling and management tool.

A motion picture editing tool primarily used for painting and retouching of movie images (was "filmgimp").

A mail client-reader (pop3, mailcap, and color support) - stable version

Dmalloc is a debug memory allocation library.

Emulates SGI's GL routines under X11

portmap is a DARPA port to RPC program number mapper.

GRACE - GRaphing, Advanced Computation and Exploration of data (a WYSIWYG 2D plotting tool, a descendant of and replacement for ACE/gr respectively xmgr) - development version

PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator.

Test a remote host with TCP "echo" (or other protocol) packets

SRP -Secure Remote Password protocol (a new mechanism for performing password-based authentication and key exchange over potentially insecure networks)

New delta generator and prototype RCS-replacement program

Set of tools for creating TeX documents with graphics which are portable (lets xfig export to other formats ie PostScript) Tools for creating portable TeX figures

Xfig is an interactive drawing tool (X11)

Monitors Ethernet or FDDI network traffic and builds databases of Ethernet/IP address pairs (next generation version)

Visual Tcl - application development environment for UNIX, Windows and Macintosh platforms (Tcl/Tk).

PDF viewer (see security patch xpdf-3.02pl1.patch

The OPeNDAP Data Connector (ODC) allows to search for and retrieve datasets published by OPeNDAP data servers (for e.g. climatic data, satellite imagery, and ocean sensor results).

TIN is a threaded NNTP and spool based UseNet newsreader

A complete and powerful command-line based DNS query and testing tool. A nameserver query utility a la 'nslookup' and 'dig' but with more extensive testing and test automation features.

LibGII (General Input Interface) - API for all possible input sources (see also LibGGI)

LibGGI (General Graphics Interface) library - a flexible drawing library (see also LibGII)

GNU Bayonne 2 is a second generation telephony application server with a special focus on SIP.

PPR is a print spooler expressly designed for PostScript printers.

network grep - applies GNU grep's common features to the network layer

A graphical user interface (GUI) builder that helps you construct cross platform applications written in Tcl (version 1.2.2a).

A graphical modular monitoring application (Tcl/Tk)

X11 Image Loading Utililty (image viewer)

GNU screen manager with VT100/ANSI terminal emulation (multiplexing up to 10 pseudo-terminals)

GNU adns - advanced, easy to use, asynchronous-capable DNS client library (for C and C++ programs) and utilities

Rexx/SQL- A Rexx interface to SQL databases (for documentation see rxsqldoc...)

A file distributing tool (newer Windows only versions may run under Wine).

GNU General Public License - Version 1, February 1991 (plain text format)

A framework for testing other programs and libraries (requires guile)

Image warping and dissolving (morphing) programs

An arbitrary precision numeric processing language (development version)

OpenDX is an application and development software package for visualizing data, especially 3D data from simulations or acquired from observations (based on IBM's Visualization Data Explorer).

Implicit Queuing System - manages cpu-hogging jobs

Converts any terminal based program into a program with an X-windows interface (help button+box, treeview, editbox, file selector, range box, and much more; uses Gtk)

Fast tool to graph and visualize lots of data (for e.g. from TCP Packet Trace Analysis)

MM - Shared Memory Library

Cross-platform mail and news client - supports POP3, IMAP and full MIME support (using wxWindows building on the gtk toolkit on Unix)

arpwarch is a ethernet monitor program for keeping track of ethernet/ip address pairings,

A collection of programs, that enables the use of the IrDA protocols (to communicate with remote devices usinge infrared wireless communication)

A sophisticated clock for the X Window system. It displays a map of the Earth and shows which portion is illuminated by the sun.

A compression and file packaging utility. It is compatible with PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems. A compression and file packaging utility. It is compatible with PKZIP 2.04g (Phil Katz ZIP) for MSDOS systems.

GNU Portable Threads - a very portable POSIX/ANSI-C based library for Unix platforms which provides non-preemptive priority-based scheduling for multiple threads of execution (aka "multithreading") inside event-driven applications

V.E.R.A Virtual Entity of Relevant Acronyms (free GNU version)

Matrix Motif widget set (allows a semi-spreadsheet view of data)

GNU Bayonne 1 is a script driven threaded state-event multi-line telephony server for creating voice response applications, such as automated attendant, call distribution, announcements and voice messaging.

Heap Layers: An Extensible Memory Allocation Infrastructure (incorporating Hoard)

OpenNTPD is a free, easy to use implementation of the Network Time Protocol (NTP) - port of OpenBSD's OpenNTPD

Automatically mount file systems (test release; Sun-style automount syntax)

Automatically mount file systems

A snapshot performance monitor

A X-window programming environment

Examine network printer information (using SNMP)

A nonblocking I/O, and OO library (used by syslog-ng)

X11 file system monitoring

GNU Pascal Compiler (GPC) (hlp ipf ms nroff rnh).

Detects and logs TCP port scans

Security Enhanced version of the GNU Locate (index and quickly search for files on your system)

Shell for computational algebraic number theory with pascal-like programming language (Linux binary)

Zsh is a powerful UNIX command interpreter (shell). Reference card (a little bit out-dated).

OpenMotif is the publicly licensed version of Motif, the industry standard graphical user interface toolkit for UNIX systems. Manual (PDF).

A full-screen character mode text editor based on the VM/CMS editor XEDIT

OpenDX - Open Data Explorer based on IBM's scientific data visualization software. Samples.

Graphically display and edit the X11 keyboard mapping

A variant of James Clark's SP SGML parser, maintained by the OpenJade team ("An SGML System Conforming to International Standard ISO 8879 -- Standard Generalized Markup Language")

IP packet filtering (for both inbound and outbound traffic)

Extended Tcl (TclX) is a set of extensions to Tcl 8.x (the Tool Command Language) and Tk 8.x

Convert a portable anymap into a Portable Network Graphics file (and vice versa)

A free MS-Word reader - converts the documents from Word 6, 7, 97 and 2000 to ASCII and Postscript (beta release)

Euler is a program for quickly and interactively computing with real and complex numbers and matrices supporting 2D and 3D plots (requires GTK+). Hint: The most recent version of Euler runs only in Windows (or under Linux in Wine).

A powerful replacement for inetd

A portable and enhanced version of syslog

System and network monitor (HTTP, IMAP, SMTP, IMAP, POP3, PING, TCP, UDP, and NNTP based checks)

Compress and expand 48x48x1 face image files

Concurrent Versions System - a front end to the rcs revision control system ("feature release")

Shell for computational algebraic number theory with pascal-like programming language (common data files)

Modular Object Oriented Dynamic SpreadSheet (Tcl/Tk)

ELM is an interactive screen-oriented mail system.

GCL (GNU Common Lisp) is a compiler and interpreter for Common Lisp.

C(++) Beautifier

Shell for computational algebraic number theory with pascal-like programming language (SunOS binary)

A program that creates large characters out of ordinary screen characters

A vector drawing program (old name: sketch; requires python) - stable version

Fast screen-oriented spelling checker An interactive spell-checking program

RealVNC (Virtual Network Computing) Java Viewer Source Distribution

A make file system for easy concurrent compilation of source code on a wide (expandable) number of platforms

Chroot applications in a sane and safe manner

Zsh is a powerful UNIX command interpreter (shell). FAQ,

GNATS (GNU Problem Report Management System) is a set of tools for tracking bugs reported by users to a central site.

Info-ZIP group's portable UnZip zipfile-extraction program (compatible with PKZIP archives)

Fortran 77 program checker - documentation (PDF)

Fortran 77 program checker (detecting unused, uninitialized, and undeclared variables)

The Emacs Lisp code for input methods for various international character scripts

Multi-user replacement for UNIX talk

A simple program to extract, test and view RAR archives created with the ARJ archiver

A Tcl/Tk based graphical user interface to the MH mail system

Cyrus IMSP (Interactive Mail Support Protocol) Server (to manage multiple IMAP servers and ...)

A tool to search a file for structured pattern

A More Intelligent Ispell (spell checker)

GNU miscellaneous files distribution

Programming in Emacs Lisp: An Introduction (texinfo)

The Edinburgh Speech Tools Library (used by the Festival Speech Synthesis System)

NEdit is a multi-purpose text editor (X11 Motif)

A More Intelligent Ispell (spell checker)

Earth map images for the sunclock program

Earth map images for the sunclock program

Electric VLSI Design System

A Java-based portable and customizable network directory management system (a kind of metadirectory system supporting NIS, DNS, Netinfo, LDAP ...)

Monitor and visualize (network) trends in time-series data (using "rrdtool")

A graphical Tcl/Tk-based browser for documentation in the info hypertext format

A smart decoder for attachments received in encoded form via electronic mail or from the usenet

Motif-based BDF (Bitmap Distribution Format) font editor

DejaGnu is a framework for testing other programs

A Tcl formatting program

xtem_TeXMenu provides for a simple and comfortable graphical user interface (GUI) to control many TeX/LaTeX facilities

Extract ASCII text from a PostScript or PDF file

The Jargon File, a comprehensive compendium of hacker slang illuminating many aspects of hackish tradition, folklore and humor.

Fast screen-oriented spelling checker (an unofficial release which adds support for the -e5 option and has some fixes)

A multiple mailbox "biff" program (requires GTK+)

Visual Tcl - application development environment for UNIX, Windows and Macintosh platforms (Tcl/Tk).

Gnatsweb is a web front-end to gnats, the GNU Problem Report Management System.

mpack/munpack - utilities for encoding and decoding binary files in MIME (Multipurpose Internet Mail Extensions) format mail messages

International X11 fonts (BDF format) for all characters that Emacs 20 can handle

The Perl-Gtk interface

HP-GL converter

An ANSI C fault tolerant memory leak and corruption detection tool

Process tree display and manipulation (X11)

OpenJade - the DSSSL user community's open source implementation of DSSSL, Document Style Semantics and Specification Language, an ISO standard for rendering SGML and XML documents (based on James Clark's Jade).

Release 1.5E of the Xaw3d toolkit. It is based on X.Org's X11R6.3 Athena toolkit, with bits and pieces thrown in from other sources. It is intended to be a general-purpose replacement for the Athena (Xaw) toolkit.

Analyzes the networks streams (dumped by tcpdump)

RXVT (ouR eXtended Virtual Terminal) is an 8-bit clean, colour less memory using xterm replacement

Zsh is a powerful UNIX command interpreter (shell). User's guide (PDF, A4 format, 335 pages).

A computer algebra system, especially for number theoretic purpose.

A vector drawing program (requires python) - development version

An ISO 3166 country code finder

Security Enhanced version of the GNU Locate (index and quickly search for files on your system)

The Edinburgh Speech Tools Library (used by the Festival Speech Synthesis System)

Oberon is a programming language in the Pascal-Modula tradition and a modern operating system for single-user personal workstations. few themes)

Persistence of Vision(tm) Ray-Tracer - ray trace renderer to create three-dimensional, photo-realistic images (source code, documentation and scene files)

OpenJade - the DSSSL user community's open source implementation of DSSSL, Document Style Semantics and Specification Language, an ISO standard for rendering SGML and XML documents (based on James Clark's Jade).

X Cut Buffers

A full-screen character mode text editor based on the VM/CMS editor XEDIT (documentation in PDF format, DIN A4)

gdbm - the GNU database manager. Includes dbm and ndbm compatability.

An extension to the Tk toolkit. It adds plotting widgets (X-Y graph, barchart, stripchart), a powerful geometry manager, a new canvas item, and several new commands to Tk.

Pretty printing of ASCII files on PostScript printers ("Sun"-like)

Converts a Tagged Image File Format (TIFF) file into a Portable Network Graphics (PNG) file

Yet Another X11/Motif-based File Manager (requires Xg widget set)

Multiformat animation viewer for X

A source level C and C++ debugger (X11), Fortran is also supported on some systems.

Converts strings from and to 2-byte Unicode UCS2 format (Perl module, needs Startup-x.xxx.tar.gz)

The GNU termcap library -- a library of C functions that enable programs to send control strings to terminals in a way independent of the terminal type.

Convert JPEG compressed images to PostScript Level 2

A flexible filter for reformatting paragraphs of text

Powerful mail processing - can sort incoming mail into separate folders/files, preprocess mail, start any programs upon mail arrival or selectively forward certain incoming mail automatically to someone, can create mailing lists (development version).

Digital image warping (morphing) for X11

Powerful mail processing - can sort incoming mail into separate folders/files, preprocess mail, start any programs upon mail arrival or selectively forward certain incoming mail automatically to someone, can create mailing lists (stable version).

A collection of tools for managing UNIX services

Truerint prints C (but also C++, Java, Perl, shell, ...) program listings on postscript printers.

Encryption/decryption support for Zip 2.3 and UnZip 5.41 (and later)

PostScript conversion to plain ASCII or HTML (requires Ghostscript and Python =< 1.5)

PostScript standard fonts for sketch-0.7.x (a vector drawing program)

The PGPLOT Graphics Subroutine Library is a Fortran- or C-callable, device-independent graphics package for making publication quality scientific graphs.

Converts files between character sets and usages (recognises or produces nearly 150 different character sets)

LHa compression/decompression for UNIX

Text and comments reformatter

Earth map images for the sunclock program

An arbitrary precision numeric processing language

Compiles statistics about wuftpd (FTP daemon) transfers

Mirrors a directory tree in every detail, suitable for timed backups of disk drives