| ActiViz.NET | ActiViz.NET documentation | http://www.kitware.com/products/avdownload.php | Other | |
| Actim | Provides the ability to transfer files and execute commands via e-mail. | http://exom.sourceforge.net | GPLv2orlater | |
| Action Mailer | a framework for designing email-service layers. | http://rubyforge.org/projects/actionmailer/ | Expat | |
| Action Query | jQuery and ActiveRecord, sitting in a tree... | http://github.com/nakajima/action-query | Expat | |
| Actionpack-action caching | action caching for Action Pack | https://github.com/rails/actionpack-action caching | Expat | |
| Activation | JavaBeans™ Activation Framework | https://www.gnu.org/software/classpathx/jaf/ | GPLv3 | |
| Active | Free groupware | http://www.active.org.au/doc/ | GPLv2 | |
| Active Calendar | Generates calendars as HTML tables | https://github.com/joechrysler/calendar/tree/master/Examples/activecalendar | LGPL | |
| Active Resources | provides a coherent wrapper object-relational mapping for REST web services. | http://code.google.com/p/pyactiveresource/ | Expat | |
| Active Spam Killer | Spam filter | http://www.paganini.net/ask/ | GPLv2orlater | |
| Active-x-obfuscator | Safely obfuscate the string 'ActiveX' inside of JavaScript code | https://github.com/felixge/node-active-x-obfuscator | Expat | |
| ActiveMQ ActiveIO | ActiveMQ ActiveIO protocol implementation framework | http://activemq.apache.org/ | Other | |
| ActiveMQ Protocol Buffers Plugin | ActiveMQ Protocol Buffers Maven plugin | http://activemq.apache.org/ | Other | |
| Activeldap | ActiveLdap is a object-oriented API to LDAP | https://rubygems.org/gems/activeldap | Other
GPLv2orlater | |
| Activerecord-deprecated finders | deprecated finder APIs extracted from Rails Active Record. | https://github.com/rails/activerecord-deprecated finders | Other | |
| Activity-log-manager | blacklist configuration user interface for Zeitgeist | https://launchpad.net/history-manager | GPLv2orlater | |
| Actor platform | multiplatform text, photo and voice message server | https://github.com/actorapp/actor-platform | AGPLv3 | |
| Acts as Audited | an ActiveRecord extension that logs all changes to your models in an audits table. | http://github.com/collectiveidea/acts as audited | Expat | |
| Acts as api | makes creating XML/JSON responses in Rails 3 easy and fun | https://github.com/fabrik42/acts as api | Expat | |
| Acts as fu | When you need a dash of ActiveRecord and nothing more. | http://github.com/nakajima/acts as fu | Expat | |
| Acts-as-taggable-on | provides advanced tagging for Rails | https://github.com/mbleigh/acts-as-taggable-on | Expat | |
| Ad-hoc Support Library | a user-space library which provides an API to faciliate implementation of routing protocols for wireless ad-hoc networks in GNU/Linux. | http://aslib.sourceforge.net/ | X11
GPLv2 | |
| AdPlug | free AdLib sound library (utils) | http://adplug.sourceforge.net/ | Other
LGPLv2orlater
GPLv3orlater | |
| Ada Components | Toolset for Ada | http://lglwww.epfl.ch/Team/MW/mw components.html | GPLv2 | |
| Ada Motif binding library | Binding to X Windows and OSF/Motif for the Ada programming language | http://home.arcor.de/hfvogt/programming.html | GPLv2orlater | |
| Ada Web Server | Ada Web Server documentation | https://libre.adacore.com/libre | BSD 3Clause
Expat
GPLv3orlater | |
| AdaControl | Ada rules controller | http://www.adalog.fr/en/adacontrol.html | Other
GPLv2orlater | |
| AdaCurses | Ada binding to the ncurses text interface library: shared library | https://invisible-island.net/ncurses/ncurses-Ada95.html | X11 | |
| AdaDoc | Documentation tool for Ada | http://adadoc.sourceforge.net/ | GPLv2 | |
| AdaGate | combination of Sokoban and Portal | https://sourceforge.net/projects/adagate/ | GPLv3orlater | |
| AdaSockets | Allows for use of sockets in Ada95 | http://www.rfc1149.net/devel/adasockets.html.en | GPLv2orlater with exception | |
| AdaUnits | Implementation of dimensioned values for Ada | http://www.dmitry-kazakov.de/ada/units.htm | GPLv2orlater with exception | |
| AdaVenture | AdaVenture is a kid-friendly retro point & click adventure game written in Ada. | https://sourceforge.net/projects/adaventure/ | GPLv3 | |
| AdacURL | Ada95 binding to the 'cURL' library | http://web.archive.org/web/20070403105909/http://www.almroth.com/adacurl/index.html | GPLv2orlater with exception | |
| Adaptive Sampling Kit | Adaptive Sampling Kit for big experimental spaces | https://code.google.com/p/adaptive-sampling-kit/ | Other
Expat
GPLv2 | |
| Adblock Plus | Ad blocker | https://adblockplus.org/ | GPLv3 | |
| Adcd | Small CD player for GNU/Linux. | https://www.nongnu.org/adcd/ | GPLv2orlater | |
| Add custom search engine | Add a custom search engine to the list of available search engines in the search bar and URL bar. | https://github.com/evilpie/add-custom-search-engine | | |
| Addendat | Blogging program that can be updated from either a CGI or shell interface | http://deekoo.net/technocracy/addendat/ | GPLv2 | |
| Addressable | alternative URI implementation for Ruby | https://rubygems.org/gems/addressable | Other
GPLv2orlater | |
| Adequate | Debian package quality testing tool | http://jwilk.net/software/adequate | Expat | |
| Adhoc | M4 macros to generate general-purpose portable shell scripts. | https://savannah.gnu.org/projects/adhoc/ | GPLv3orlater
GPLv3orlater with exception | |
| Adie | Programmer's text editor | http://www.fox-toolkit.org/adie.html | LGPL | |
| Adjtimex | Displays or sets the kernel time variable | http://www.ibiblio.org/linsearch/lsms/adjtimex.html | GPLv2 | |
| Adlint | Source code static analyzer | http://adlint.sourceforge.net/ | GPLv3orlater | |
| Admesh | Tool for processing triangulated solid meshes | https://launchpad.net/admesh/ | GPLv2orlater | |
| Adminer | Web-based database administration tool | http://www.adminer.org/ | Other | |
| Adns | Asynchronous DNS client library and utilities. | https://www.gnu.org/software/adns/ | GPLv3orlater | [[File:Heckert_gnu.small.png|30px]] |
| Adtool | Utility for Active Directory administration | http://gp2x.org/adtool/ | GPLv2orlater | |
| Advance | Personal information management (PIM) system | http://sourceforge.net/projects/advance/ | GPLv2 | |
| Advanced Bash-Scripting Guide | An in-depth exploration of the art of shell scripting | https://tldp.org/LDP/abs/html/ | PublicDomain | |
| Advanced Stock Tracking System | A web based stock tracker | https://sourceforge.net/projects/ast/ | GPLv2orlater | |
| Advanced package tool | Package manager | https://wiki.debian.org/Apt | | |
| Advene | Annotate DVDs, Exchange on the Net | http://www.advene.org/ | PublicDomain
Other
GPLv2orlater
BSD 3Clause
Expat
GPLv2
Creative Commons Attribution 3.0 | |
| Ae | assertive expressive (ae) is an assertions library | http://rubyworks.github.com/ae | Other
BSD 2Clause | |
| Aegis | Software configuration management system | http://aegis.sourceforge.net/ | GPLv2orlater | |
| Aegisub | advanced subtitle editor | http://www.aegisub.org/ | PublicDomain
Zlib
ISC
Other
BSD 3Clause | |
| Aenig4 | Enigma M4 Cipher Machine Emulator | https://jorgicor.niobe.org/aenig4 | Expat | |
| Aeolus | Synthesised pipe organ emulator | http://kokkinizita.linuxaudio.org/linuxaudio/aeolus/ | GPLv2orlater | |
| Aerc | An efficient and extensible TUI email client for hackers | https://aerc-mail.org/ | Expat | |
| AeroCalc | a package that performs various aeronautical engineering calculations. | http://www.kilohotel.com/python/aerocalc/ | BSD 3Clause | |
| Aesfix | tool for correcting bit errors in an AES key schedule | http://citp.princeton.edu/memory/code/ | GPLv2orlater
BSD 3Clause | |
| Aeskeyfind | tool for locating AES keys in a captures memory image | http://citp.princeton.edu/memory/code/ | GPLv2orlater
BSD 3Clause | |
| Aeskulap | Medical image viewer and DICOM network client. | https://www.nongnu.org/aeskulap/ | Other
GPLv2 | |
| Aeson-pretty | JSON pretty-printing tool | http://hackage.haskell.org/package/aeson-pretty | BSD 3Clause | |
| Aether | Library to handle Java artifact repositories | http://aether.sonatype.org/ | Other | |
| Aetherspace | Project to produce a multiplayer game. | https://www.gnu.org/software/aetherspace/ | AGPLv3orlater | |
| Aewan | Tool for creating and editing ASCII art | http://aewan.sourceforge.net | GPLv2orlater | |
| Aewm | Lightweight window manager | http://www.red-bean.com/~decklin/aewm/ | Expat | |
| Affero | Software to facilitate funding of non-profits | http://www.affero.org/ | AGPL-1.0-or-later | |
| Affinity | is a desktop search tool. | http://code.google.com/p/affinity-search/ | GPLv2orlater | |
| Affy | BioConductor methods for Affymetrix Oligonucleotide Arrays | http://bioconductor.org/packages/release/bioc/html/affy.html | Other | |
| Affyio | BioConductor tools for parsing Affymetrix data files | http://bioconductor.org/packages/release/bioc/html/affyio.html | Other | |
| Afick | File integrity checker | http://afick.sourceforge.net/ | GPLv2orlater | |
| Afick-Webmin | Facilitates afick remote administration | http://afick.sourceforge.net/ | GPLv2orlater | |
| Afm | Ruby library to read Adobe Font Metrics files | https://github.com/halfbyte/afm | Other
Expat | |
| Afpfs-ng | Client for the Apple Filing Protocol (AFP) (transitional package) | http://sites.google.com/site/alexthepuffin/home | GPLv2orlater | |
| Aften | A simple A/52 (AC-3) audio encoder. | http://aften.sourceforge.net/ | GPLv2orlater | |
| AfterStep | Window manager for X | http://www.afterstep.org/ | GPLv2orlater | |
| AfterStep Clock Applet | Clock | http://web.cs.mun.ca/~gstarkes/wmaker/dockapps/time.html | GPLv2 | |
| Ag.el | Emacs frontend to ag | https://github.com/Wilfred/ag.el | GPLv3orlater | |
| Agatha | A simple PHP script for streaming music and playlists with Apache. | http://agatha.sourceforge.net/ | GPLv2 | |
| Agave - GNOME Colorscheme Generator | A simple GNOME application for generating color schemes. | http://home.gna.org/colorscheme/ | GPLv2orlater | |
| Agda | dependently typed functional programming language | http://wiki.portal.chalmers.se/agda/ | Other | |
| Agda standard library | standard library for Agda | http://wiki.portal.chalmers.se/agda/ | Expat | |
| Agda-executable | commandline interface to Agda | http://wiki.portal.chalmers.se/agda/ | Other | |
| Agenda du libre | A calendar management project, for events and activities related for Free Software and its communities | http://www.agendadulibre.org/ | | |
| Agendaroids | A simple vector-based asteroid-shooting game | http://www.newbreedsoftware.com/agendaroids/ | GPLv2 | |
| Agg | AntiGrain Geometry graphical toolkit (development files) | http://www.antigrain.com | GPLv2orlater | |
| Aggregate | Ruby class for accumulating aggregate statistics | http://github.com/josephruscio/aggregate | PublicDomain
Other | |
| Aghermann | Sleep-research experiment manager | http://johnhommer.com/academic/code/aghermann | GPLv2orlater
LGPLv2 | |
| Agide | a framework in which separate tools can work together. | http://www.a-a-p.org/ | GPLv2 | |
| Agile Toolkit | Agile Toolkit is a powerful web development framework. | http://agiletoolkit.org/ | AGPLv3orlater | |
| Agnostos | Web-based tool for managing to do lists | http://www.xenoclast.org/agnostos/ | GPLv2orlater | |
| Ahcpd | Ad-Hoc Configuration Protocol | http://www.pps.jussieu.fr/~jch/software/ahcp/ | Other | |
| Ahven | Unit test library for Ada (debug) | http://ahven.stronglytyped.org/ | Other
GPLv3orlater | |
| Aigaion | Aigaion is a web-based system for managing annotated bibliographies. It is BibTeX compliant and can im- and export in the BibTeX and RIS format. | http://sourceforge.net/projects/aigaion/ | GPLv2orlater | |
| Ain2 | syslog logging for Node | https://github.com/phuesler/ain | GPLv2orlater
Expat | |
| Aiodns | Asynchronous DNS resolutions | https://github.com/saghul/aiodns | Expat | |
| Aiohttp | Framework for making asynchronous HTTP client and servers | https://github.com/aio-libs/aiohttp | Expat
Apache2.0 | |
