Projects licensed under GPLv2
- 3D Battle Go — 3d arcade version of the ancient Chinese game Go
- 3D Pong — A vector-based ball-bouncing game for X-Window
- 3dFB — 3D file manager and browser
- A+ — Programming language (APL interpreter)
- ACL2 — Programming language for modelling computer systems and proving properties of those models
- ACal — Simple Web-based calendar
- AFD — Automatically distribute files
- AIDE — Intrusion detection system
- AJAX Book Reader — A Web application for displaying large texts one page at a time.
- AMaViS-ng — Searches attachments and archives for malicious code
- APSR — TCP/IP packet sender to test firewalls and other network applications
- APing — advanced ping program written in python that can make four type of ICMP probes
- ASCEND — A flexible modelling environment for hard engineering and science problems.
- AVFS — Lets programs look at archived files without having to recompile them
- AWOL — In/out board
- Abook — Addressbook program
- Absence — Calendar for keeping track of people
- Absolut Engine — Advanced news/content publishing system
- AbsolutePunch — Virtual implementation of a mechanical timeclock
- Abuse — Shoot-'em-up game
- Achievo — Web-based project management and tracking tool
- Acon — Displays Arabic text
- Acovea — Compiler optimization tool
- Active — Free groupware
- Ada Components — Toolset for Ada
- AdaDoc — Documentation tool for Ada
- Addendat — Blogging program that can be updated from either a CGI or shell interface
- Advance — Personal information management (PIM) system
- AfterStep Clock Applet — Clock
- Agatha — A simple PHP script for streaming music and playlists with Apache.
- Agendaroids — A simple vector-based asteroid-shooting game
- Airs — check for new TV episodes
- Alarm Pinger — Monitors IP devices by ICMP echo requests
- Alfandega Firewall — Implements iptables-based firewalls
- Aliaslu — Looks up email addresses in an NIS map
- Aliens — Alien-shooting game for X-Window
- Alist — Collects and stores information about systems
- AllCommerce — E-commerce/content application
- AllTray — Software for docking any program.
- Ampache — Apache/PHP-based MP3/Ogg file manager and player
- Anguly Mail Client — A lightweight Mail Client written in C and Gtk+
- Anti-Web httpd — Single-process Web server
- Anubis — Processes outgoing mail
- Apophenia — Statistics library for C
- Archive — Drag-and-drop multi-format archiver
- Ardour — A multitrack, multichannel audio recorder/non-linear editor.
- ArgusEye — A GUI for the Argus network auditing suite.
- Aria — Download tool with GUI that can pause, resume, and queue downloads
- Arping — ARP level ping utility
- Ascii — Prints an argument in various ASCII formats
- Asterisk Managment Portal — A turn-key SMB phone system based on The Asterisk PBX, complete with Web GUI.
- Astroconst — Makes header files that define astrophysical constants
- Atlc — Package for designing and analyzing electrical transmission lines and directional couplers
- Atool — Script for managing file archives
- Aub — Downloads and decodes articles from newsgroups
- Audacity — Audio editor
- AutoDia — Creates XML diagrams
- AutoProfile — Profile Manager Plugin for Gaim
- Autoproject — Creates a skeleton source package for a new program
- Autotable — Automates maintaining a set of SQL tables
- Autothrottle — Adjusts CPU according to the system load
- Averist — Adds an authentication layer to any CGI application written in Perl
- BBrun — Run window for Blackbox
- BIEW — Is a multiplatform portable viewer of binary files with built-in editor in binary, hexadecimal and disassembler modes. It uses native Intel syntax for disassemble.
- BIF — PHP framework for Web application development
- BIRD — Dynamic routing daemon
- BIRT — Resizes multiple images at once
- BMI — Calculates body mass index
- BRL — Language for server-side Web applications
- BYLD — Helps users build a mini distribution
- Babylon — Lets groups chat and draw over TCP/IP connections.
- Backroute — Router monitor
- BakaSub — A GTK+/Gnome video subtitling program.
- Balance — TCP proxy
- Balsa — GNOME mail client
- Baobab — An application to analyse directory trees
- Barcode — Converts text strings to printed bars
- Bash.Diff — Extended version of the 'bash' shell
- BashBurn — A CD burning utility.
- Basic File Splitter ( bfsplit ) — Basic File Splitter (bfsplit) splits files into pieces.
- Batemail — Strips attachments from email messages
- Battle Just Started — 3D arcade tank battle
- Benchmark-Timer — Times and becnhmarks portions of code
- Big Sam — Guestbook
- Biggles — Creates 2D scientific plots
- BioImageXD — BioImageXD can do 3D image ananlasis and visualisation of microscopy and other 3D data, and also make movies.
- Bitlbee — IRC gateway to other chat networks
- Blender — 3D modeller/renderer
- Blip_Buffer — Band-limited sound synthesis library for use in video game sound chip emulators
- BlueDot — Tracking and Web site activity measurement script
- BlueZ — Bluetooth for GNU/Linux
- Blwm — Window manager
- Board-tnk — Discussion board
- BoboBot — Jump-and-run game
- Bobot++ — IRC Bot that can be scripted using Scheme
- Bochstools — Scripts and programs to be used with the Bochs-emulator
- Bond — Tool for developing database frontend applications
- Booby — PIM that supports bookmarks, contacts, notes, news and tasks
- Bookcase — Collection manager for KDE
- Bookmark4U — Bookmark manager
- Bookmarker — Bookmark manager
- Bootstrapper — Creates a customized bootstrapping script
- Bras — Command execution tool
- BrickOut — A simple brick-breaking game
- Brikx — A game in which your goal is to remove all tiles.
- Bubblegum — Watches files for changes via stat()
- Bug-buddy — GNOME bug-reporting utility
- BugSquish — Use the mouse to squish the bugs before they suck your blood
- Bugdar — Is a bug tracking system.
- BuildBot — Automates the compile/test cycle of software development
- BulkWatch — Takes action when an IP has exceeded its maximum settings
- BusyBox — Tiny versions of many common utilities
- Bygfoot Football Manager — Small and simple graphical football (a.k.a. soccer) manager
- ByteHoard — A file transfer, storage, and mangement system.
- CARE2X — A program that integrates different information systems of hospitals.
- CDS-PHP — CSD-PHP Control de service para empresas informáticas
- CGI Calendar — CGI-based event calendar that does not need a database
- CGI::Cache — Caches output of time-intensive CGI scripts
- CGoban — Client program for the game of Go
- CLEX — File manager
- COBOL for gcc — Project to produce a free COBOL compiler
- CPG — Specifies language grammars and computes, generates, and simulates the corresponding automatons
- CRM114 — Regex mutilator and filter
- CUPS — Portable printing layer
- CVSGraph — Generates graphical representations of CVS revisions and branches
- CWirc — X-Chat IRC client plug-in to transmit Morse code
- Cage — Replacement for 'chroot'
- Calcoo — Scientific calculator
- Calcurse — Text based PIM
- Camera Picture Copier — A digical camera picture copier/renamer.
- Catase — Serves documents in response to queries
- Catdoc — Changes Word files to ASCII text
- Cats2procmailrc — Generates a .procmailrc file
- Cave — An ncurses ascii character animation viewer
- Ccache — Compiler cache
- Cce-interact — Online learning system
- Ccvssh — Secure ext-to-pserver bridge for cvs
- Cdcd — Plays CDs
- Cdda2wav — Records audio tracks digitally into wav files
- Cedar Backup — Backs up files on local and remote hosts to CD-R or CD-RW media
- Celebrat — Text-mode calendar application
- Cereal — Emulation framework for 8051-compatible CPUs and connected devices
- Cflow2vcg — Cflow to VCG converter
- Championship Generator — A program that produces a list of all the meetings between a set of teams.
- ChangePassword — Change passwd, Samba, and Squid passwords.
- Changedfiles — Framework for filesystem replication, security monitoring, and/or automatic file transformations
- Chart — Stock and commodity market charting
- Chbg — Manages the background of a desktop
- CheckWebsite — Performance monitoring and uptime notification tool
- Checkaliases — Reads and monitors a sendmail alias file
- Chess — Chess game
- ChessX — A chess database.
- Chrpath — Modifies the dynamic library load path
- Chupacabra — Administrative IRC bot
- ChurchInfo — ChurchInfo is a web-based church database application. A database of members and families facilitates automation of many administrative activities.
- CinePaint — A deep painting and image retouching tool for film.
- Cinelerra — Advanced audio/video content creation system for GNU/Linux
- Circus Linux — Bounce clowns into the air so they pop balloons
- Citadel — BBS program
- Cite CRM — Customer Relations Management Software For Computer Repair Industry
- CitrusDB — Is a customer database and billing software solution
- Cjukebox — Directory-based management system for audio files
- Clam AntiVirus — An anti-virus utility for Unix.
- ClearHealth — Medical practice management system and EMR
- ClusterSSH — Automatically sends text to multiple windows
- CoaSim — Coalescence process simulator
- CoaSim-gui — GUI for the CoaSim coalescence process simulator
- Code Striker — Script to facilitate collaborative code reviews
- Coin — 3D graphics library whose API is based on the Open Inventor API
- Colorifer — Utilities that color the output of other processes
- Comfigure — Wrapper to run configuration scripts
- Command Line Trash — command line interface to trash
- Compilercache — C and C++ compiler wrapper
- Conc — Serial console concentrator package
- Cone — Text-based email client
- Console Othello — text othello
- ConvertFS — File system conversion utility
- Corkscrew — Small program for tunneling SSH through HTTP proxies
- CorneliOS — "Web Operating System"
- Cream CRM — A customer relationship management system for media organizations.
- Createusers — Adds or removes users in bulk
- Crossroads Load Balancer — Load balance utility for TCP
- Cryptkeeper — A system tray EncFS frontend.
- CryptoTools — Cryptographic-related applications that run from batch, console or GUI without installation
- Cryptonit — Lets users encrypt/decrypt and sign/verify files with PKI certificates
- Current — Server implementation of RedHat's up2date tools
- Cvsauth — Authentication daemon for the CVS pserver method
- Cvschk — Checks for new files and modifications to old files
- Cvsplot — Analyzes the CVS history of a project
- Cxref — Produces documentation from C source code
- Cymbaline — Intelligent learning music player
- DForum — Web site discussion forum
- DHEX — Ncurses-based hex-editor
- DRT — Design recovery tool for interactive graphical applications
- DULog — New log notifier and parser
- DVDStyler — A DVD authoring system
- Darkstat — Network statistics gatherer
- Darwin2k — Robotics design and simulation program
- DataCaptureTool — This is a TCl/Tk package for getting data out of scientific plots (or from any other plot for that matter).
- DataMonster — D&D command line management program
- Dead Souls — A MUD library that lets you make online text adventure games.
- Deb Creator — GTK wizard tool to build deb packages
- Debt Payoff — Calculates how long it takes to pay off credit cards
- Defendguin — GNU/Linux-themed Defender clone
- Deluge — a Bittorrent client written in Python/PyGTK
- Deroff — Removes roff and preprocessor constructs
- Desktop Data Manager — A clipboard manager and screenshot taking application.
- Devfsd — Manages entries in the Device Filesystem
- DiaCanvas2 — Diagramming widget
- Diffutils — Finds differences between and among files
- Dimnum — C++ library for storage and conversion of dimensionful values
- Disc-Cover — Produces covers for audio CDs
- Diskfree — Tracks and reports changes in file size
- Dkimap — IMAP4 daemon
- Dnsmasq — Small DNS forwarder
- DocMGR — A enterprise level document manager
- Doclifter — Translates n/t/g/roff documentation to DocBook XML markup
- Double Choco Latte — System for tracking bugs, changes, enhancements, and requests for software
- DrQueue — Distributed rendering queue
- Drip — DVD to divx conversion application
- Drunkifier — Translates text into drunken text.
- Duplicate Music Matcher — Duplicate Music Matcher is a application to quickly find duplicate MP3, OGG, and FLAC files based on letter matching.
- Dupseek — Finds and removes duplicate files
- Duty Roaster — Duty Roaster is a program for managing and generating duty rotas
- Dynamic Probes — Debugger
- E — Automated theorem prover
- E-xmms — Enlightenment applet for XMMS
- ECNCheck — Tests for ECN support and RFC-violating refusal
- EDMA — Modular development environment
- ELF statifier — Combines multiple executable files into one
- ELinks — Enhanced version of the 'links' text browser
- EMC — EMC is software that implements real-time control of equipment such as machine tools, robots, and coordinate measuring machines.
- EMirror — Ftp mirror script
- ENodes — Web development and publishing framework
- EZRO — System for managing Web-based content
- Easy Benchmarking Suite — Data collection, analysis, and plotting of Web site benchmark timings.
- EasyChains — GUI for a console firewall script
- Eboard — Chess board interface for ICS
- Echoping — Testing tool for TCP servers
- Eject — Puts removable media under software control
- Elca — Real-time calculator
- Electric Fence — Memory debugger
- Electronic Medical Imaging System — Medical information system
- Elib — Library of Emacs LISP functions
- Elmer — Elmer is a computational tool for multi-physics problems.
- Elysium Download — Download manager for GNOME
- EmPy — Embeds Python expressions and statements in template text
- Emacs Common Lisp — Common Lisp implementation for Emacs
- Emacs Wiki — Wiki system for Emacs
- Emdros — Database engine for annotated or analyzed text
- Empire — War game
- Endeavour — File browser/File manager
- Enemies of Carlotta — Small, simple mailing list manager
- EnterTrack — Artifact tracking and management system.
- Entombed! — A one- or two-player maze crawl
- Epkg — Package manager for the Encap package management system
- Epylog — New log notifier and parser
- Eqe — LaTeX equation editor
- EsounD — Audio file player and sound daemon
- Etherape — Network monitor
- Euchre — Spades or bridge-like card game
- Eukleides — Euclidean geometry drawing language
- Euterpe — Media archive searching applet
- EverCrack — Cryptanalysis engine
- Evolution RSS Reader Plugin — An RSS reader plugin for Evolution.
- Extended Operating System Loader — Graphical boot loader
- Ezstream — A flexible Icecast source client with support for external de-/encoders.
- FAI — Automatically installes Debian onto a PC cluster
- FTPmond — Automatically tells a mailing list about new files
- Fake — Activates backup servers on a LAN
- Fast rendering toolkit — Toolkit for 3D animations using low-end machines
- Fcron — Schedules periodic commands
- Fenris — Tools for code debugging and examining possibly hostile applications
- Ferriscreate — Creates new objects in the filesystem
- Ffproxy — Filtering HTTP proxy server
- Fianchetto — Free swiss tournament manager for chess tournaments
- Figaro's Password Manager — A GNOME app to securely store and encrypt passwords.
- File Ripper — A tool for extracting files from disk images.
- FileRepair — Compares and modifies files across a network
- FileRoller — Archive manager for Gnome
- FileTools — Multiplatform application for working with checksum files
- Filters — Converts proprietary formats to XML-based formats
- FireDNS — Library for handling asynchronous DNS queries
- FireMake — Creates makefiles
- FireString — Facilitates C string handling
- Fireflier — Firewall tool built on top of the iptables framework
- Firestorm — Network intrusion detection system
- Fityk — Non-linear curve fitting and data analysis
- FlacFile — Attaches files to FLAC files using the metadata section
- Flawfinder — Analyzes code for security risks
- Flc — Shows the FILE_ID.DIZ and ID3 tag of every file
- Flexbackup — Backup tool for both local and remote files
- Flight Gear — Flight simulation software
- Flock — File locking utility
- Flumotion — Streaming media server
- FlyBird — Is a file manager
- Fnord httpd — Small HTTP server
- Fontlinge — Font management and organisation tool for TrueType and PostScript fonts
- FooBillard — Billiards simulation
- Fotox — Photo contrast editing
- Free Pascal Compiler — Free Pascal compiler
- Free S/WAN — IPSEC and IKE for GNU/Linux systems
- FreeCAD — Computer Aided Drawing
- FreeMED — A Web-based medical record (EMR) and medical practice management system.
- FreeMED — Web-based medical records and patient management system
- Frocor — A sound-graphics installation.
- Frontier — Geometric constraint solver
- Frost — C++ compiler wrapper
- FrozenBubble — Animated penguin game
- Ftpcopy — Copies files or directory trees
- Funct — Stores and modifies mathematical functions
- FunctionCheck — Profile generator for C/C++ programs
- FunkLoad — A functional and load tester for Web applications.
- G-Cows — Facilitates Web site creation
- GAA Argument Analyzer — Analyzes command line arguments
- GAP — GAP is a system for computational discrete algebra, with particular emphasis on Computational Group Theory.
- GCronTime — Manages 'cron' function
- GENDIST — Creates individual distributions
- GENtle — Bioinformatics software for everyday molecular biology tasks
- GIFT — Content based image retrieval system
- GKrellM — System monitor package
- GLE — C functions that draw extruded surfaces
- GMT — Geographic mapping tools that produce EPS illustrations
- GNAT — A complete Ada95 compilation system
- GNOME Debian Package Manager — A graphical manager for Debian packages.
- GNU Gatekeeper — A free H.323 gatekeeper.
- GNU Pascal — Pascal compiler of the GNU Project
- GNU SQL — Database management system
- GNU ghostscript — Interpreter for the Postscript and PDF graphics languages
- GNU go — Plays the game of Go
- GNU tar — Creates tar archives
- GNU trueprint — Prints source code to PostScript printers
- GNUMed — Software for a paperless medical practice
- GNUTS — GUI toolkit abstraction library
- GNUscape navigator — Web browser that runs under GNU Emacs
- GPL Arcade Volleyball — A multi-platform Arcade Volleyball clone
- GPLIGC — Analyzes IGC flight data from GNSS flight data recorders used by glider pilots
- GPRename — GUI batch file renamer
- GPS — Simulates particle behavior
- GPSMan — Graphical manager for GPS data
- GRASS (Geographic Resources Analysis Support System) — Geographic information system
- GSAMBAD — GSAMBAD is an easy to use GTK+ frontend for the SAMBA file and print server.
- GSKey — Generates MD5 sums
- GTS — Functions for 3D surfaces meshed with interconnected triangles
- GTybalt — Computer algebra system
- Gaby — Small personal database manager
- Galaxium Messenger — GNOME Instant Messenger
- Gale — Instant messaging software
- Gamazons — Board game
- Game Launcher — A front end for game emulators
- Gameping — Monitors games servers
- Garnome — Build utility for the Gnome desktop
- Gbiff2 — Displays headers when new mail has arrived
- Gcron — Replacement for Vixie cron
- GdMap — A tool to display disk space using treemaps.
- Gdbm — Replacement for the 'dbm' and 'ndbm' libraries
- GeSHi — A generic syntax highlighter for PHP.
- Gecko Multimedia System — A replacement for your VCR, DVD, MP3, and CD player.
- Gedafe — Web front end for databases
- Gemdropx — Pull gems down and throw them back to make matches
- Genigma — Free 'enigma' emulation
- Gequel — GTK-based frontend for MySQL
- Getargs — Python command line parser
- Getmail — Simpler replacement for fetchmail
- Ghemical — Molecular modelling application
- Ghex — Binary file editor
- Ghost for Linux — A hard disk and partition imaging/cloning tool using compression and FTP.
- Give/Take — Filesharing application
- Gjots — Lets you make notes in tree form
- Glame — Sound editor
- Glom — GUI for PostgreSQL tables
- Gmessage — Replacement for xmessage
- Gmrun — Run program utility
- Gnarwl — Autoresponder
- Gneuro — Euro converter
- Gnomba — GUI Samba browser
- Gnome Character Map — Selects high ASCII characters
- Gnome Flow — Calculates and visualizes steady-state fluid flows
- Gnome Toaster — CD creation suite
- GnomeLDAP — Administrative tool for LDAP directories
- Gnomedb — Framework for developing database applications
- Gnomeradio — FM radio tuner
- Gnonlin — A non-linear editing library built on top of GStreamer.
- Gnu 8085 Simulator — A graphical 8085 simulator and assembler with a debugger.
- Gnu Math — Unfinished software to simplify programming for scientific applications
- GnuLedger — Income and expense tracker
- Gnuboy — Gameboy emulator
- Gnuml — Backend to manage mailing lists and email archives
- Gnutrition — Nutrition analysis software
- GoldenPod — A podcast aggregator
- Googleware — Automatically queries Google
- GooseQuill — Software for managing and marketing all types of writing projects
- Gotmail — A utility to non-interactively download email from a Hotmail account.
- Gpasman — Password manager
- Gperf — Generates a hash function
- Gphoton — 3d modeller with integrated ray tracer
- Gpsdrive — Map-based navigation system
- Gqview — Image browser
- Grace — 2D plotting tool
- Grafist — Bandwidth utilization viewer
- Graft — Package management utility
- GraphThing — Tool for creating, manipulating, and studying graphs
- Gravityd — Graphical display of network testing tools
- GreatCharts — A commandline tool that generates stock charts.
- Grepmail — Searches for emails in normal or compressed mailboxes
- Gretl — Software for econometric analysis
- Gretools — Vocabulary building tool for Gnome
- Gringotts — Securely saves sensitive data
- Grisbi — A personal finance manager.
- Gromit — System configuration tool
- Group-Office — A Web-based groupware office suite.
- Grsecurity — Security system that implements a detection/prevention/containment strategy
- Grsync — A GTK GUI for rsync
- Gsmbscanner — NetBIOS scanner program
- Gtk-nocker — TCP security port scanner
- GtkAda — Ada 95 graphical toolkit
- GtkExtra-- — C++ wrappers for GtkExtra
- GtkHTML — HTML rendering/editing library
- GtkLife — Implementation of Conway's Game of Life
- GtkOL-LDAP — Is a client GUI designed to manage OpenLDAP directories.
- GtkPSproc — Graphical frontend for 'psutils'
- GtkSpell — Spellchecker for GTK's TextView widget
- Guarddog — Firewall generation/management utility for KDE 2
- Gujin — Graphic bootloader, kernel loader, floppy simulator on HD, FD, and CDROM
- Gwenview — Image viewer for KDE
- Gwork — Tracks the work a company does and/or the products it sells
- Gxmlviewer — XML viewer for Gnome
- Gzip_x86 — 'gzip' distribution tuned for faster decompressing
- HTML Code Convert — Helps convert HTML code into various other languages
- HTML Family Tree Generator — Creates view of a family tree
- HTTP Anti Virus Proxy — A proxy with a ClamAV anti-virus scanner.
- Hammerhead — A Web stress testing tool.
- Handbrake — DVD Ripper and Audio/Video Converter
- Hanzim — Visual, interactive Chinese character and word dictionary
- HardInfo — System profiler and benchmark tool
- Hardware Lister (lshw) — Is a small tool to provide detailed information on the hardware configuration of the machine.
- Harmonics — Harmonics files for Xtide
- HarvestMan — Multithreaded offline browser
- Hdup — Filesystem backup tool
- Heartbeat — Monitors hosts and provides high-availability failover services
- Hermes Antispam Proxy — is a generic, transparent, multi-platform anti-spam SMTP proxy.
- HexCurse — Ncurses-based hex editor
- Hexedit — Displays, edits, and searches in ASCII and hexadecimal
- Hitchhiker's Guide to the Internet — A German-speaking introduction to the technical aspects of the Internet.
- Hobbit — Scheme to C compiler
- Holocrunchies — Computational holography program
- Homebrew Decompiler — decompiles Java class files
- Horgand — Graphical FM real time organ
- Hot Potato Online — Bomb the opposition with explosive potatoes in this multiplayer arena sport game.
- Hotwire — Hotwire is intended to replace the interactive command execution portion of a typical Unix shell.
- Hping — Sends custom packets and displays target replies
- Html2fo — Converts from html to xml:fo formats
- Htmlrecode — Modifies HTML files
- Httptunnel — Creates a data path in HTTP requests
- HuegoGallery — A dynamic photo gallery written in php
- HuffmanView — Visualizes the Huffman tree algorithm.
- Hybrid Logics Model Checker — C implementation of model checking algorithms for Hybrid Logics
- Hydrogen — Drum machine/sequencer
- ID3.py — ID3 MP3 info tag manipulation in Python
- IP Sentinel — Prevents unauthorized usage of IP addresses
- IP Traf — Generates network statistics
- IPFC — Manages security modules
- IPStream — Crossplatform libraries for working with TCP/IP protocols
- IRM — Asset tracking system for IT depts. and helpdesks
- ISO Master — A graphical editor for ISO images.
- ISP-Check — Tests the connectivity of your ISP
- IT++ — C++ library of mathematical, signal processing, speech processing, and communications classes and functions.
- IceMe — Graphical menu and shortcut editor for the Ice window manager
- Icecast — Streaming media server based on the MP3 audio code
- IcedTea — free JVM
- Iceutils — A suite of command line tools designed to make creating a game world easy.
- Ignorance — Content filtering plugin for Gaim
- ImLib3D — Library and visualization system for 3D image processing
- ImgSvr — Web server designed for image publishing
- Imgv — Image viewer
- Indexed PDF Creator — Creates indexed PDF documents from text files
- Inkscape — SVG editor
- Internet radio protocol — Playlist manager and streamer for Internet radio stations
- IrcGraph — Visualizes IRC traffic
- IrssiBot — IRC bot
- Isabella — Gothic font
- Issue-Tracker — Support issue tracking system
- JGloss — Adds reading and translations annotations to Japanese text
- JILetters — Alphabet-learning tool for children
- JRuby — Java version of the Ruby interpreter
- Jacquemate — Turn-based Web chess system
- Java Tetris — Tetris game
- Jbrout — A modular photo manager
- Jebi — A program to record AM/FM radio and publish it to a podcast feed.
- JitterBug — Web-based bug-tracking tool
- Jpg2html — Generates thumbnails and the corresponding HTML
- Jumpnbump — Cute multiplayer platform game with bunnies
- Jungle Monkey — Distributed file sharing program
- KCachegrind — Profiling Visualization
- KDirStat — Displays disk usage information for directory trees
- KHdRecord — Audio recorder that writes directly to the hard disk
- KLibido — KDE Usenet file grabber
- KLinkStatus — A link validity checker.
- KLone — Embeddable web server and SDK to write dynamic HTML pages using C/C++
- KMyMoney — A KDE personal finance program.
- KNewMail — Checks incoming mail and displays headers
- KPhotoAlbum — A tool for indexing/browsing/searching large numbers of images and/or videos.
- KSEG — Euclidean geometry simulator
- KSlackCheck — Syncs, monitors, and displays changelogs and updates
- KWebWatch — Monitors Web pages looking for changes
- Kadet — Server
- Kaffe — Complete, PersonalJava 1.1 compliant Java environment
- Kalkulon — A programmable expression calculator for programmers
- Kanatest — Kanatest is a simple hiragana and katakana drill tool.
- Kbiff — Mail notification utility
- Kci — Simulates chemical reactions
- Kernin — Script for kernel install
- Kexchange — A currency converter which gets the latest rates from the Internet.
- Keychain — Key management front-end for OpenSSH's ssh-agent
- Keystone — Digital library suite
- Kid3 — An efficient tagger for MP3, Ogg/Vorbis, and FLAC files.
- Kile — LaTeX source code editor
- Kleandisk — Removes extraneous files from your hard disk
- Klear — A KDE-based DVB TV viewer and hard disk recorder for GNU/Linux.
- Klicklack — A plugin-based dictionary application for KDE.
- Knettools — Network testing tools
- Kodos — Tool for working with regular expressions
- Kommuni-K — Gathers multiple electronic communications systems together in one application
- Kuickshow — Image viewer
- LCDnetstat — Displays incoming TCP/IP connections
- LIMBAS — Is a web application based on tables, forms and reports with many other built-in features like a filemanager, workflow engine and user management
- LPRng — Extended print spooler system
- LSAT — Security auditing tool
- LTSP — Linux Terminal Server Project
- LUCAS — LDAP monitoring framework
- Larbin — Web crawler
- LastBASH — LastBASH is a console/terminal based player for Last.fm written in Bash.
- Latex4jed — Enhanced LaTeX mode for the Jed editor
- Launch.app — Executes applications
- Launchtool — Launches applications
- LavaPS — Interactive process-tracking program
- Lavengro — Vocabulary test engine
- Ldapdiff — Compares and adjusts ldif files with a running LDAP server
- Ldapvi — Lets users update LDAP entries with a text editor
- Leafpad — Simple GTK+ based text editor
- Lesspipe.sh — Input filter for 'less'
- LiVES — Video editing system
- LibData — Library web management system
- LibHTTPD — Adds basic Web server capabilities to an application or embedded device
- LibStroke — Stroke translation library
- Libcisco — Automates configuration management for Cisco network equipment
- Libdvdcss — Library for transparent DVD device access with CSS on-the-fly decryption
- Libferris — Virtual filesystem
- Libgaudio — C/C++ library to incorporate sound and sound effects into games
- Libgenrics — Is a library to provide object services
- Libgtkol — Is a GTK C++ Object Layer
- Lich — Playlist creator/manager.
- LinCVS — Graphical CVS frontend
- LinCity — City/country development simulation game
- LineControl Server — Remotely controls server connections
- Linux (BLOB free version) — UNIX kernel often used with the GNU system
- Linux Vacation — Automatic mail-answering program
- LinuxLive — Set of scripts for creating a live CD
- LinuxTaRT — Signature generator
- Little Wizard — A development environment for children.
- LiveSync — Synchronizes data between two systems
- LivingInternet Web Site Template — Source and user manual providing a simple, automated structure for provision of standard navigation functionality for web sites with multiple chapters and subsections.
- Lodju — Lodju creates indexes of digital images
- Logintop10 — Creates "Top 10" lists from wtmp statistics
- LongPlayer — MP3 player for listening to large collections or long periods of time
- Looking Glass — A looking glass written as a CGI script
- Luma — Accesses and manages data stored on LDAP servers
- Lurker — Mailing list archiver
- Lustre — Storage and filesystem architecture for very large clusters
- Lutel Firewall — Firewall and NAT/masquerade router for home networks or multiple subnet applications
- Lynx — Text mode browser
- Lyricue — Edit/displays song lyrics on a screen or projector
- LyxDogs — Mail merge program
- MC — Converts text documents into a vector space model
- MH-E — Emacs interface to the MH mail system
- MIME-tool — Constructs MIME encoded messages with file attachments
- MODEL — Analyzes and simulates rate equations
- MP3tm — Helps you to tag all your MP3s and set unique names.
- MRTG — Monitors traffic load on network links
- MT2 Thumbnailer — Generates HTML photo albums
- MTX — Controls tape drives and autoloaders
- MUltihost SSH Wrapper — Broadcasts commands over SSH to multiple hosts.
- Mad Bomber — Uses buckets to catch falling bombs
- MagicStats — Web server log analysis tool
- Mah-Jong — Mah-Jong game, graphical client, and computer player
- Mail-bounce — Returns customized email to the sender
- Mail2clf — Generates a CLF file from email
- Mail::Mbox::MessageParser — Basic but very fast mbox parser
- Mailgraph — Mail statistics RRDtool frontend
- Majentis — Conflict resolution tool for CVS
- Man-db — Reference manual page database and browser
- Man2web — Converts man pages to HTML
- Manhattan Virtual Classroom — Delivers courses via the Web
- Mantis — A PHP-based bug tracking package.
- Mantra — A centralized, Web-based newsreader.
- Manyapad — Text editor
- Mapuche — MApuche, The Chilean PHP CMS.
- Margana — Anagrammer
- Mass — Project to develop a semi-2D game without using bitmaps
- MathPlanner — Mathematical design and publishing tool
- Matjito — Library for fast math expression evaluation
- MatrixSSL — Is an embedded SSL implementation.
- Mauve — Unfinished free test suite for the Java class libraries
- Maxemum TV-Guide — A TV guide for KDE.
- Mbuffer — Enhanced version of buffer
- Meeting Room Booking System — Multiple site meeting room bookings.
- Meld — GNOME 2 diff and merge tool
- Memo — Reminder application
- Memtest86 — Memory test for x86 computers
- Menstruation Calendar — Tracks menstrual cycles
- Mercurial — A fast distributed SCM.
- Mergelog — Merges and sorts HTTP log files
- Mesk — A GUI music player application.
- Meta-CVS — Version control system built around CVS
- Microbrew Microsieve — Spam filter for USENET
- Microscopic Window Manager — Minimalist window manager
- Midnight Commander — Unix file manager
- Mifluz — Full text inverted index query library
- Mig — Interface generator for the Hurd
- Milter-Virus — Wrapper for virus scanners
- Minimum Profit — A programmer's text editor.
- Mioga — Intranet groupware application
- Mirror — Turns your entire display black
- MirrorMagic — Game where you shoot around obstacles to collect energy using your beam
- MisterHouse — Home automation with Perl.
- Mkautosmb — Makes the local SMB network browsable
- Mkcgi — Helps generate form processing CGI scripts
- MoB — Realtime multimedia manipulation environment
- Mod_Survey — Displays and handles Web questionnaires
- Mon.cgi — CGI interface for checking the status of a 'mon' service
- Monit — Utility that monitors daemons or similar programs
- Mono — implementation of the various ECMA and .NET
- Moodle — System for producing educational course Web sites
- Moodss — Modular System Monitoring Software
- Moonlight3D — 3D modeller
- Morsetrainer — Program for learning Morse code
- Motor — Text mode IDE
- MrVoice — Perl/Tk front-end for an MP3 database
- Mrbs — Meeting room booking system
- Mtools — Lets Unix systems work with DOS files
- Mtr — Network diagnostic tool
- MuSE Streamer — Mixing, encoding, and network streaming sound tool
- MultiSync — Synchronizes PIM data between devices
- Multiplication Station — Learn to add, subtract and multiply
- Multitail — Tail on multiple windows with a ncurses interface
- Multitalk — An interactive presentation program.
- Multiuser Address Management System/Book — Web-based address system/book
- Mumbles — Is a Dbus based notification system
- Munin — Gathers, graphs, and displays information
- Music Manager — A Konqueror plugin for management of audio files (MP3, Ogg, etc.).
- My Blog — A blog that aims to be simple to use, with many advanced and unique features.
- My Handy Restaurant — Software for running a full-service restaurant
- My Photo Gallery — Web-based photo gallery that also supports non-image filetypes
- MyCMS — Internet publishing system
- MyDNS — Free DNS server designed for use with MySQL
- MyNews — Script to scan websites
- MyPaint — A quick and easy paint program like the GIMP
- MyPos — A simple Web-based administration tool for postfix.
- MyRPM — A script to create an RPM package from a list of files.
- MySAR — A dynamic web-based squid log analysis system
- NKAds — Banner ad administration system
- NNTPobjects — C++ classes for creating NNTP clients
- NOLA — A PHP-based business accounting and inventory application.
- Nanoblogger — Simple blogger
- Natural Language Toolkit — Toolkit for writing programs that process natural language
- Nbook — Guestbook script
- NeDNS — Multilingual domain system
- NetPBM — Converts graphics formats
- Netfilter2html — Uses GAWK to process netfilter logs
- Netstat-nat — Displays NAT connections
- Netsukuku — A P2P network system
- Network Monitoring Tool — Stores and manages information about your network devices
- NetworkManager — Program to provide a persistent network connection
- NewsCloud Media Platform — A media platform for citizen journalism and the social news
- NewsFeed — RSS reader and aggregator with minimal dependencies
- Newsadmin — Simple news administration system
- Newspost — Newsgroup posting tool
- Newsq — Helps to efficiently process messages in an outgoing mail queue
- Nflash — Posts news to a Web site
- Nice — Object-oriented language with advanced features
- Noffle — Offline news server
- Nomarch — Extracts files from the old .arc archive format
- Nonsense — Random text generator
- NorthStar — Tracks and assigns IP allocations
- Notespam — Filter-style spam-marking script
- NuFW — Filters packets on a per-user basis
- NumEdit — A very powerful and simple to use hexadecimal / binary / octal / decimal editor.
- NumExp — Math-oriented programming language
- Nut — Diet and nutrient database
- Nuxeo CPS — Collaborative portal and content management server
- OBM — Intranet groupware application
- OGDF — Open Graph Drawing Framework
- OSCAR — Helps build free software clusters
- OSKit — Tools for operating system development
- OWFS — the 1-wire filesystem
- Octave — High-level language for numerical computations
- Oleo — Lightweight spreadsheet program
- OmniORB — CORBA orb
- OneFinger — GUI for writing CLI commands with the mouse
- Online Grades — Online Grades is free software allows schools post grade information online using exports from several popular gradebook programs.
- OpenEMR — A medical practice management and health record (EMR) system.
- OpenFOAM — Computational Fluid Dynamics (CFD) toolbox
- OpenProofPower — a specification and proof tool
- OpenRealty — Real estate listing manager
- OpenWengo — SIP Software
- Openmailadmin — A new approach to administration of IMAP mail servers.
- OrangeHRM — Is a comprehensive Human Resource Management (HRM) System.
- Otak — Provides command line interface for programs without one
- PAI — Artificial intelligence program
- PARI/GP — Software for computer-aided number theory
- PCB — Designs printed circuit board layouts
- PCXFirewall — IPTables firewalling application
- PDF Editor — A GUI editor for manipulating PDF documents
- PDFMap — Generates maps in PDF format
- PDFjam.txt — Interface to the pdfpages package for pdfLaTeX
- PHPFilm — Manages a film collection
- PHPX — Web content management system
- PHPkrm — GNUPG keyring manager
- PIKT — System monitoring tool
- PIPS — Converts data between formats
- PJ — Toolkit for creating and manipulating PDF documents
- PLM — Tracks the lifecycle of patches against a source tree
- PMReport — PHP/MySQL report generator
- POPauthd — Authorizes connecting hosts for SMTP relaying
- PWP Wiki Processor — Wiki written in PHP
- Packet2sql — Converts files with ipchains packet logs to SQL inserts
- Pagecast — Submits lists of URLs to search engines
- Pancho — Makes configuration changes through SNMP and TFTP
- Panorama — Framework for 3D graphics production
- Pantry — Is a command line nutrient analysis.
- Paperclips — Webserver and dynamic content container
- Papyrus — XML-based reporting langauge for PostgreSQL and MySQL
- Parchive —
- Parma Polyhedra Library — C++ library for the manipulation of convex polyhedra
- Pasdoc — Documentation generator for pascal source code
- Patch — Applies a patch to a file
- Paxutils — Tool to manage file archives
- Paymaster — A payroll and HR database application
- Pencil — traditional 2D animation program
- Penetrator — Indexes big trees
- Penguin Greetings — Internet greeting card application
- Perl Critic — Critiques Perl source code for best-practices
- PerlBoard — Threaded messageboard system
- Perltidy — Perl code indenter and beautifier
- Personal Expenses Manager — Is a command line accounting program
- Pfm — Terminal based file manager
- Pharch — Lets users place their photo archive on the Web
- Photoshrink — Creates thumbnails and writes the supporting Web pages
- PhpMyExplorer — Lets you update your site online without ftp access
- PicBook — Automatically produces an HTML album of your images
- Picalo — Data Analysis Software
- Pinfo — Ncurses based info documentation browser
- PipeMore — Pipes data to a new window
- Plait — A program that builds playlists and submits them to a music player.
- Planet Finder — Shows the location of planetary bodies
- Plans — Web-based calendar
- Playmidi — MIDI player for GUS, FM, and external MIDI devices
- Pliant — Programming language framework
- Pogo — Launcher for X11
- Poink — TCP/IP-based ping implementation
- PolygonPuzzle — Tesselation puzzle
- PonG — Library and GUI tool for creating configuration dialogs
- Pootypedia — A tool for tracking your end users' hardware.
- Pop3eye — POP3 email notifier
- Poppy — Retrieves email headers
- Pound — Reverse HTTP proxy, load balancer, and SSL wrapper
- PreMail — Mail previewer and deleter
- Privoxy — Web proxy with advanced filtering capabilities
- ProGuard — Java class file shrinker and obfuscator
- Profoil-WWW — Wind tunnel data analyzer
- Psmon — Process monitor
- Psyched — task management for GTK
- Psychopg — PostgreSQL database adapter for Python
- Ptx — Index generator
- Pure FTP server — FTP server
- PurpleView — Paper review system
- PwManager — Password manager
- Pwytter — Is a Twitter GUI client
- PyKota — Print quota system for CUPS
- PyMaViS — Removes email attachments and scans them for viruses
- PyPE — Midsize programming editor
- PyPIV — Is a Python clone of a Matlab toolbox for PIV (Particle Image Velocimetry) analysis
- PyTone — Music jukebox written in Python
- Pygmy — Gnome mail client written in Python
- Pyne — Offline newsreader and emailer
- Pysweeper — Implementation of the classic Minesweeper game
- PythoPhotoPod — Python-based GTK+ GUI for synchronizing photos and photo albums with your pod with a color display
- PythonMilter — Python interface to sendmail's libmilter
- Pythoneol — An program for helping English speakers to learn Spanish.
- Q-Graph — Library for combinatorial graphs
- QDVD-Author — DVD authoring suite
- QDist — Computes the quartet distance between unrooted evolutionary trees
- QMetro — Electronic metronome
- QPopper — POP3 server
- Qmail-Scanner — Content scanner for qmail
- Qmail-masq — Masks an internal mail address
- Qps-h — A GUI version of ps and top a process monitoring tool.
- QtUnit — Testing framework for C++
- QueryXmms — Queries XMMS about what it is currently doing
- Quicktables — Iptables firewall/NAT script generator
- Quilt — Patch management tool
- QuoteEngine — Lets users store IRC quotes in a MySQL database
- RATS — Security auditing tool for source code
- REJIK — Web filtering system
- RFC — Helps system administrators run a filesystem checker
- RIGEL — Representation-Independant Genetic Engine Library
- RPM Wizard — An easy-to-use RPM installer.
- RRD Tool — Stores and displays time-series data
- RadioActive — Front-end for video4linux-compatible radio devices
- Ragel State Machine Compiler — Compiles finite state machines from regular languages into runnable C code
- Randomsig — Produces random signatures
- Re-Tail — An intelligent incremental logfile reader.
- Really Rather Good Battles In Space — A real time strategy game with fleets of spaceships.
- Recode — Front end to the 'recode' translation library
- Recruit — Academic job application management system
- Reed — Autoscroller
- ReferenceFinder — Finds sequence to locate a point in a square
- Referencer — A document organiser and bibliography manager
- Regular Expression Graphing Program — A regular expression graphing program.
- Rekall — Database front end for KDE
- Relax log analyzer — Web server log analyzer
- Remembrance Agent — Associative memory applications
- Reqtool — Tool for managing e-mail requests
- Rexima — Curses-based interactive mixer
- Rh-errata — Maintains a Red Hat system
- Rhyming Dictionary — Rhyming dictionary
- Ringlink — Tools for running Web rings
- Rippy the Aggregator — Lightweight RSS aggregator
- RoadMap — A car navigation system for Unix and PocketPC.
- Rockbox — Firmware for Archos MP3 players
- Rocks'n'Diamonds — Puzzle game similar to Sokoban, Boulder Dash, Emerald Mine, or Supaplex
- RootkitHunter — Scans for rootkits, backdoors, and sniffers
- Roxen — HTTP server
- Rpmstatus — Shows which RPM packages are installed on machines
- Rpncalc — RPN calculator emulating H-P 28S
- Rubber — Building system for LaTeX documents
- Ruby/RSS — Object oriented Ruby library for manipulating RSSs
- Rumor — MIDI keyboard to Lilypond converter
- Run — Controls CPU biasing of processes
- RunLaunch — GTK/Gnome program execution utility
- Rx — Free regex library
- SANE — API that provides access to raster image scanner hardware
- SAPID Inline CMS — SAPID is a CMS for creating and managing websites
- SCA-CMS — Content management system based on PHP and the SCA class library
- SDLHana — An SDL-based Hanafuda game.
- SGK — One-way encryption algorithm
- SGQI — Print quota system for CUPS
- SINS — Simple modular nibble-like game
- SISC — Java-based Scheme interpreter
- SImg — Astronomical image processing software
- SLOCCount — Counts lines of code in a program
- SMILCut — Synchronizes data from different media sources (previously named LiveCut)
- SMILutils — Tools for manipulating SMIL format files
- SNACC — ASN.1 to C or C++ compiler
- SNORT — Network intrusion detection system
- SPA — Archiving tool for Web pages
- SPlotter3D — 2D and 3D plotter
- SQL-Ledger Accounting — Multiuser double entry accounting system
- SQLDiff — Shows the difference between two SQL database tables
- SQLiteManager — Tool for managing SQLite databases
- SafetyNet — Keeps critical processes running
- Sagasu — Finds strings in multiple files
- Samhain — File system integrity checker
- Schedultils — 'chrt' and 'taskset'
- Schism Tracker — An Impulse Tracker clone.
- SciGraphica — Data analysis and technical graphics
- Scid — Chess database
- Scout Portal Toolkit — Toolkit for developing online knowledge bases
- Scriptorium — Multi-lingual code library
- ScriptsMill Comments — It is a free php script that allows users to add comments on certain pages of your website
- Sdcdc — Build system for the Debian CD's covers and labels
- SecretSanta — Web application for anonymous giving within a group
- Sede — Electronic voting software
- Sedsed — Generates debug files in sed
- Sencap — Encapping software
- SendIP — Sends arbitrary IP packets
- Senddfbymail — Downloads, splits, and emails files
- Serel — Improves boot time
- Sglib — C library inspired by the Standard Template Library from C++
- Shed — Curses-based editor
- Sherlog — Website log analyzer
- Shohei Mail — Web-based multi-user mail gateway.
- Shoreline Firewall — Iptables based firewall
- Shuffle DBuilder — sophisticated shuffle algorithm
- Siege — HTTP regression testing and benchmark utility
- Sigel — 3D robotic simulation
- SimPy — Simulation package for Python
- Simdock — Is a fast and customizable dockbar for the desktop.
- Simple Instant Messenger — ICQ client
- SimpleForm — Simple, quick, usable form processor
- Sipsak — Tests SIP devices and applications
- Sitr — Knowledge Base
- Skidbladnir — Tool to solve technical problems
- Skipper — Full GUI accessibility for severely movement impaired people
- Skipstone — Browser that embeds Mozilla through libgtkembedmoz
- Slide2handout — Creates printable versions of PDF slides
- Slideshow Creator — A visual editor for dvd-slideshow.
- SlimServer — Interface for various types of music playback
- Smail — Mail transport system
- SmartCache — Java proxy cache server
- SmartEiffel — Eiffel compiler
- SmokePing — Monitors and graphs network latency
- Snackware — A game in which programmers compete with each other.
- SnapLogic — SnapLogic transforms data into Data services using a RESTful architecture and built in Python
- Snatcher — Full-text search engine for Japanese or English text
- Snoopy Logger — Logs all executed commands
- Snortalog — Summarizes Snort logs
- Snowbox — Small, secure POP3 server
- Snowlog — Web server access log browser and analyzer
- Snownews — Text mode RSS/RDF newsreader
- Sodipodi — Vector drawing applications
- Sound Monitor — Shows esound output
- SoundConverter — Converts audio formats within GNOME
- Sox — Converts between various audio formats
- Spam Trainer — A drag and drop spam filter trainer for GNOME.
- Spaminator — Web interface for sendmail's anti-spam functionality
- Spastic — Set of Filters for email
- SpecTcl — Helps analyze nuclear physics event data
- Spinner — Keeps telnet and ssh links from dropping
- Split-Dist — Calculates the number of splits (edges) that differs for two trees
- SplitVT — Splits a terminal window into two shell windows
- Splonk — Spam eliminator
- SportsTracker — A tool for recording sport activities.
- Sqlupdate — Generates scripts for updating MySQL databases
- Squirrel Shell — System shell
- SquirrelMail — E-mail reader
- Stand Alone Tray — A stand-alone notification area.
- Stat — Displays information about a file
- StatEye — Determines web site traffic
- Step into Chinese — to help English speakers learn Chinese
- Stereograph — Stereogram generator
- StickyNotes — Electronic Post-It notes
- Stitch — Backup utility
- Stress — Simulates certain types of stress of a system
- Subterfugue — System call tracing and rewriting utility
- Sudoscript — Provides an audited root shell
- Sunwait — Calculates sunrise, sunset, and civil, nautical, twilight, astronomical twilight
- Super-sed — Enhanced version of the sed text editor
- SuperKaramba — A tool to allow desktop eye-candy.
- SuperTux — SuperTux is a classic 2D jump'n run sidescroller game in a style similar to the original SuperMario games.
- Superswitcher — A more feature-ful replacement of the Alt-Tab window switching behavior.
- SureInvoice — SureInvoice is an accounting and time management application for service oriented businesses. This Professional Services Automation software is simple to use but also very powerful.
- Surfraw — Command line interface to the Web
- SweepOver —
- Swpkg — Software packaging tools
- Sysstat — The sar, mpstat, and iostat commands
- System call tracker — Intercepts and acts on system calls
- SystemImager — Automates an installation to multiple machines
- T2 — Distributed Build Tool
- TCDR — Frontend for various audio programs
- TFT Gallery — Image gallery that doesn't need a database
- TOCHNOG — Finite element analysis program
- TRE — Regexp matching library
- TTRM — Generator of musical arrays and search machine for pitch class sets
- TWiki — Web-based collaboration platform
- Tanne — Session management tool for HTTP
- Tapeback — Backup system
- Taper — Backup application
- Tardy — Tar post-processor
- Tarot Club — Tarot card game
- TaskJuggler — Project management tool
- Tau — Utility to track student attendance and scheduling
- Taxbird — An Elster client (for German tax declarations).
- Tcl-tools — Tools for Tcl programmers
- Tcptraceroute — Traceroute implementation using TCP packets
- Tdl — To-do list manager
- Tellico — Collection manager for KDE
- Templeet — Template engine
- Tent — PHP/SQL intranet application
- Terraform — Fractal landscape generator/viewer
- TestDisk — Check and undeletes partitions
- TextTokenizer — Module for fast text analysis/parsing
- The Anomy Sanitizer — Blocks e-mail based security risks
- The Freedos Project (FreeDOS Kernel) — Project to create a free, 100% MS-DOS compatible operating system
- The Jaza Animator — `Animator' for the Z formal specification language
- Theorur — A GTK2 GUI for Ogg/Theora live streaming.
- Thought Bucket — A Web interface for storing random thoughts and ideas.
- Threads — Library to make threading under C++ easier
- Tiger — Performs security audits and acts as a host-based intrusion detection tool
- Tile Driller — Simple paint program
- Tiny COBOL — COBOL compiler
- Tiny Login — Suite of small Unix utilities
- TinyDYN — Client and server software for dynamic DNS services
- Tiobench — Threaded I/O bench for Linux
- TkDVD — A GUI for burning DVD+R/W -R/W discs.
- Tkhangman — GUI version of the classic 'hangman' game
- Tksql — Edits PostgreSQL database tables
- To-Do — Web-based to do list application
- Toast — *nix package manager
- Tojo — Web-based collaborative journal system
- Train Director — Train dispatch simulator
- Tram for Tulip — TRAM is a collection of modules for the sofware Tulip (see www.tulip-software.org), which is extended in this way to analyse and display trace-data.
- Transconnect — Lets users behind a proxy connect directly to the internet
- Trash Can — Command line recycle bin
- TreeLine — Organizes and stores text in a tree structure
- TunnelTools — Allows access to anonymous rsync and CVS pserver servers from inside a firewall
- Turck MMCache — Opcode cache for PHP
- Turma — A Gtk text search and replace utility.
- TuxCall — Call waiting detector
- TuxPaint — Drawing program for young children
- TuxWordSmith — Multi-lingual "Scrabble"
- Twin — Text-mode window enviro