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  • zynaddsubfx - Free implementation of a sound synthesizer
  • Zthread - Object-oriented threading and synchronization library
  • Zsh - Shell resembling the Korn shell
  • Zorp - Proxy firewall suite
  • Zope - Web application server
  • zoidberg - Shell written, configured, and operated entirely in Perl
  • zoem - General purpose macro language
  • zmixer - Simple volume control
  • Zlib - Data compression library
  • ziproxy - Proxy that gzips files and reduces image size
  • Zinf - Cross-platform audio player
  • Zina - GUI tool for audio
  • Zim - A desktop wiki.
  • Zile is Lossy Emacs - An Emacs clone.
  • zgv - Picture viewer for VGA/SVGA
  • zerotools - Tools to aid compression of virtual machine disks with Linux virtual machines.
  • Zeppoo - Software to detect if a rootkit is installed on your system.
  • Zen-Slideshow - Is a php slideshow application for web sites
  • zenity - Displays Gtk+ dialog boxes from the command line or shell scripts
  • Zebra - Implementation of routing protocols - Part of the GNU Project
  • Zebedee - Secure tunnel for TCP/IP or UDP data transfer
  • Zdisk - Creates a boot/rescue floppy or CD
  • Zapping - A TV viewer program for GNOME.
  • z2tml - Converts files in the Z document language to HTML
  • yuv4mpeg - Let users creat yuv4mpeg filters in Perl
  • Yum Repo Sync - A script for creating a local repository for yum.
  • yudit - Unicode text editor for the X Window System
  • ytree - File manager with an xtree-like interface
  • Ytalk - Multi-user chat program
  • YSM - An easy ICQ console client.
  • ypserv - Simple network lookup service
  • youhp3 - HTML preprocessor
  • yhttpd - Lightweight Web server
  • Ygl - 2D graphics library
  • Yelp - Gnome help browser
  • yeemp - Decentralized instant messaging
  • Yed - Library of modules for object-oriented programming
  • yaws - Light-weight, threaded Web server
  • yawk - Wiki clone written in gawk
  • yavipin - Secure tunnel
  • YasSS - A program that solves and generates Sudokus from the command line and curses.
  • yassl - BuildS security functionality into applications and devices
  • YASM - A rewrite of the NASM assembler with additional support (64-bit, Mach-O, etc.)
  • Yard - Scripts for creating rescue disks
  • yappa-ng - Manages an online photo gallery
  • Yapbib - Manages a set of literature references
  • Yam - A tool that builds a local RPM repository from ISO files and RPM packages.
  • yaGTD - A utility designed to make the management of your to-do list quick and easy.
  • yagg - Generates all strings of a user-specified length.
  • Yaccviso - Visualization tool for bison and yacc grammars
  • yabasic - Version of 'basic' that includes only the commonest, simplest elements
  • yChat - Chat server daemon
  • xzgv - Picture viewer for the X Window System
  • Xyz2lla - A program that converts XYZ to LLA coordinates.
  • Xxdiff - Graphical comparator and merge tool
  • Xwrits - Reminds you to take wrist breaks
  • xvkbd - Virtual keyboard program
  • xvidcap - Screen capture aplication
  • XTux - Network shoot-'em-up game featuring free software mascots
  • Xtraceroute - Graphical version of 'traceroute'
  • xtla - Emacs front-end to GNU Arch
  • XTide - Tide clock and tide predictor
  • xtermcontrol - Gives users dynamic control of XFree86 xterm properties
  • Xterm - Terminal emulator for the X Window System
  • xtctl - Sets and or changes xterm properties
  • xtalfind - Checks whether any XTAL is suitable for a HAM radio circuit
  • xtail - Watches file growth
  • xstroke - Unfinished gesture recognition program
  • xshogi - X window interface for GNU Shogi
  • xshipwars - Tee like functionality
  • Xsh - XML editing tool
  • xsd - XML Schema to C++ translator
  • Xscreensaver - Screen saver and locker for the X Window System
  • Xsane - Scanner-oriented frontend for SANE
  • XRoar - A Dragon 32/64 and Tandy Coco emulator.
  • Xrmap - Displays portions of the earth
  • xrebind - xrebind allows you to bind keys or buttons. These can be used to generate mouse motions, button presses or releases, key presses or releases, or to launch programs.
  • xpvm - Graphical console and monitor for PVM
  • xps - Displays Unix processes as a tree under X
  • X Python Newsreader - A multi-platform newsreader with Unicode support.
  • Xplanet - Draws the earth or other planets
  • xpenguins - Lets penguins walk on top of your windows
  • Xpdf - PDF file viewer
  • XPde - An XP-like desktop environment for GNU/Linux.
  • Xpath2rss - XPath to RSS scraper
  • xpaint - Image editor
  • Xpad - Virtual sticky notes
  • Extended Operating System Loader - Graphical boot loader
  • XOOPS - An extensible, OO (Object Oriented), easy to use dynamic web content management system, ideally for small to large dynamic community/blog/intra/corporate portals and much more
  • xnetintf - X application for managing network interfaces
  • xnee - Records, distributes, and replays X11 protocol data - Part of the GNU Project
  • Xmsgd - Messaging daemon for the X Window System
  • X-Moto - A Motocross game.
  • Xmorph - Image morphing program - Part of the GNU Project
  • Xmmsctrl - Controls xmms from the command line
  • Xmms - GUI based mp3 player
  • xmms-syncup - Synchronizes the audio output of client players to a single server
  • Xmms-shell - Command line interface for 'xmms'
  • xmms-crossfade - An XMMS output plugin for crossfading and gapless output.
  • XMMS Announcer - A simple utility that prints the current track playing in XMMS.
  • xmlto - Converts an XML file into a specified format
  • xmlstarlet - Tools for working with XML documents and files
  • xmlmp - Facilitates writing *nix manpages using XML
  • xmlg - Splits an XML file into a TextArray and XML markup information
  • Xmldb - Three-tier application server
  • xmlclitools - Command line tools for manipulating XML data
  • xml2var - Converts XML tags to shell variables
  • Xmedcon - Medical image conversion utility and library
  • Xmcd - CD player utilities
  • xmail - Mail server
  • Xmahjongg - Mahjongg game
  • xlogmaster - Monitors logfiles and devices - Part of the GNU Project
  • xlog - Logs radio contacts
  • xlocate - XLocate is a configurable X front-end to the standard locate utilities, allowing more flexibility and ease of use.
  • xlit - Converts text from one writing system into another.
  • xlhtml - Convert Excel/PowerPoint to html
  • Xinfo - X window program for reading Info files
  • Xinetd - Secure replacement for 'inetd'
  • xine - Video player for Unix-like systems
  • xhkeys - Assigns actions to otherwise unused keys
  • Xhippo - Playlist manager - Part of the GNU Project
  • Xhdbench - Tests output speed of various devices
  • xgrabsc - Screen capture program
  • xgawk - Extensible GNU Awk, with XML, PostgreSQL, and MPFR
  • xfs - Journaling filesystem
  • Xfree86 - Free implementation of the X Windows System
  • xfontselector - Facilitates font selection for X Windows
  • XFmail - X11 email application
  • xfig - Drawing program for X Window system
  • xffm - Modular filemanager with a tree view and icon view
  • X File Explorer - A file manager for the X Window System.
  • xfce - Lightweight desktop environment
  • XFA - Portable finite state automata library
  • XenMan - GUI based xen management tool
  • Xem - Program to calculate Ph balance
  • xdiskusage - Displays disk space usage
  • Xdiary - Calendar/diary program
  • Xdefactor - Polish language project for small offices
  • xd3d - Simple scientific visualization tool
  • xcutmp3 - Frontend for cutmp3
  • Xcoral - Mouse-based text editor
  • X-Chat - Graphical IRC client
  • X-CD-Roast - CD creation tools
  • Xcave - Software to manage a wine cellar
  • Xboard - Graphical chessboard - Part of the GNU Project
  • Xbindkeys - Binds keys or mouse buttons to shell commands
  • Xbasic - Development environment
  • xaw3d - Toolkit that adds a 3D appearance and support for XPM images
  • X Automation Tools - Tools that control command line input to X
  • xautolock - Monitors console activity under the X window system
  • Xart - Paint program
  • Xapian and Omega - Information retrieval library and search engine.
  • xaos - Real-time fractal zoomer - Part of the GNU Project
  • xCHM - Graphical CHM viewer for *NIX
  • x86info - Displays diagnostic information about CPUs
  • x2vnc - Lets screens on two different computers act as one
  • x11vnc - Lets users work remotely with real X displays with any VNC viewer
  • dtrx - Intelligently extract many archive types
  • X-word - A GTK program for doing crosswords.
  • x-Desktop - Unifies different interfaces into a browser-only interface
  • Wyrm Tools - A suite of tools for any RPG system.
  • wyoEditor - Cross-platform editor based on the editor in Scintilla
  • Wyneken - Wyneken is a content-oriented text processor that makes your life as a student easier by allowing you to create and manage digital notebooks.
  • WxWindows - Cross-platform toolkit
  • wxweather - Reference implementation of the Open Weather Project system
  • wxRemind - A wxPython-based GUI for Remind.
  • wxChecksums - Calculates and verifies checksums
  • wx12Ton - Lets users work with music involving twelve-note series
  • wuja - An applet for integration of Google Calendar.
  • Wsmake - Website pre-processor
  • wsh - Remote shell that works via HTTP
  • Wreq - Trouble tracking system
  • WrapText - WrapText.c - naive, greedy, but flexible text wrapping function
  • wput - The opposite of wget.
  • Whois proxy - Perl whois tool
  • wormux - funny fight game on 2D maps
  • Workrave - Helps users prevent or recover from RSI
  • Workon - Sets up the environment to work on a CVS tree
  • WordGenerator - Generates words from a specification of syllable structure.
  • word2x - Word to HTML, LaTex, and ASCII converter
  • Woof (Web Offer One File) - Is a simple file sharing program with built in web server
  • womb - Repository for homeless code - Part of the GNU Project
  • wn - HTTP server
  • wmxkb - Shows and controls XKB groups
  • Wmweather+ - Weather app for windowmaker
  • Wmusic - Remote control for xmms
  • Wml - HTML generation toolkit
  • wmii - is a dynamic window manager for X11.
  • wmi - Lightweight window manager for X11
  • wmget - Runs and monitors multiple downloads
  • wmfire - Displays a burning fire to show the load on a machine
  • wmconfig - Menu generation tool for X window managers
  • wmakerconf - Configuration tool for the WindowMaker window manager
  • wmDrawer - Provides a drawer for launching applications
  • wlanmeter - Monitors the signal/noise level on wireless network interfaces
  • wl - Whitelist/blacklist for email
  • wixi - A personal wiki-like application for the desktop.
  • TuxGuitar - TuxGuitar is a multitrack guitar tablature editor and player written in Java-SWT, It can open GP3,GP4 and GP5 files
  • Wireshark - Network protocol analyzer
  • Wired - A professional music production and creation system.
  • Wipe - Secure file wiping utility
  • Wings3D - Is a polygon mesh modeller
  • Winefish - A LaTeX editor for experienced users.
  • wine - Wine is a Free and Open Source implementation of the Windows API on top of X and *nix.
  • Window Maker - Window manager for X Window System - Part of the GNU Project
  • WIMS - Hosts interactive mathematical activities
  • willows TWIN - Cross-platform API
  • Wildcard - Renames files
  • WikyBlog - A Bliki CMS (blog + wiki) written in PHP/MySQL.
  • WIKINDX - A multi-user bibliographic and quotations database and authoring system.
  • Wifi Radar - Connect and List local Wifi Networks
  • whtlist - Simple function to enforce whitelist (ensure that a string includes only certain characters) and blacklist (ensure that a string absolutely does not include certain characters).
  • Whois - Advanced and intelligent whois client
  • whitespace - Cleans up extraneous whitespace in source files
  • White_dune - Graphical VRML97 editor/animation tool
  • Which - Prints out full path of execuatbles - Part of the GNU Project
  • Wheretero - A tool to detect country from network information.
  • whatpix - Duplicate file finder.
  • Whatmask - Helps manipulate network settings
  • Wgrab - Automatically retrieves selected parts of Websites
  • Wget Script generator - Script generator for wget
  • Wget4web - Monitors download information through a browser
  • Wget - Retrieves files from the Web - Part of the GNU Project
  • WFlogs - Firewall log analysis tool
  • wesnoth - fantasy turn-based strategy game
  • WeOCR - A platform for building Web-enabled OCRs.
  • WendzelNNTPd - Is a simple USENET server with the goal of being as easy to use as possible.
  • Wellenreiter - An easy to use, GTK/Perl-based wireless sniffer/scanner with enhanced features.
  • weex - Remote maintenance utility
  • Weechat - Lightweight and extensible IRC client
  • Webwatcher - Tool for tracking Web content
  • WebVocab - A tool to study vocabulary while you surf the Web.
  • Easy SVN Browser - An SVN browser that works with minimal software dependencies.
  • Webrowse - Interacts between browser and other desktop components
  • Webminstats - Sysstats module for Webmin
  • Webmin - Web interface for Unix system administration
  • Webilder - Software that downloads wallpapers from Flickr and Webshots.
  • webfs - HTTP server for purely static content
  • Webcpp - Converts source code to HTML
  • WebCleaner - A filtering HTTP proxy.
  • webCDwriter - A tool for network CD/DVD writing.
  • Webcam_server - Streaming video server
  • WebCal - WebCal - Simple PHP Web Based Calendar.
  • Webbase - Web crawler
  • WebAPP - Web Automated Perl Portal. A community portal or content management system written in Perl.
  • Web Submission and Review Software - Web-based software package for submission and review of papers to academic conferences
  • Web of Life - Is a video game of life and death.
  • webAlbum - Generates Web-based photo and video albums
  • Web100 - Helps get 100% of the available bandwith for common TCP applications.
  • Web-bench - Simple web server benchark.
  • Wdm - Graphically handles login and authentication
  • wdiff - Front end to GNU 'diff' - Part of the GNU Project
  • wcd - Directory changer
  • Wcalc - Calculator
  • Wcal - Web-based calendar/planner
  • WBOSS - Web-based spell checker
  • wbar - An eye candy quick launch bar.
  • Wavelan-applet - Displays the signal strength of a WaveLan card
  • Wavbreaker - A tool to split wave files into multiple chunks
  • Waterworks - Realtime compositing system
  • Watchdog - Software watchdog daemon
  • WallpaperZapper - A GNOME background changer.
  • wallpaperChooser - A graphical wallpaper managing and setting application.
  • Wah!Cade - A GUI front-end to the xmame emulator for arcade games.
  • w98podfetch - A script for downloading podcast subscriptions.
  • w3pw - Password manager
  • w3perl - Web logfile analyser
  • w3m - Text mode browser
  • Vulture - An SSO Reverse Proxy based on Apache and mod_perl
  • Vulcan Chess - A chess variant inspired by a certain well-known sci-fi TV series.
  • vtracer - Verilog Testbench auxiliary tool
  • vtigerTE - Thunderbird/Mozilla extension for vtiger CRM
  • vtigerCRM - Web-based customer relationship management (CRM) software
  • vthrottle - SMTP throttling engine for Sendmail servers
  • Vstr - String library for network communications
  • vshnu - Visual shell
  • vsftpd - FTP server for *NIX-like systems
  • VRweb - Browser for 3D worlds and scenes
  • vreng - Software for interacting with virtual environments over the Internet
  • Vrcon - Utility for administering Half-Life servers
  • Vpopmail - Manages virtual domains and email accounts
  • Vp7wkp - Simulates radioactive decay
  • Vorbix - Graphical tools for Ogg Vorbis
  • Vorbistools - Tools for Ogg Vorbis
  • Volumevis - An application for easy high-quality display of volume datasets.
  • VoiceOne - A GUI interface to Asterisk PBX.
  • VoiceApp - Sound visualization application (Power spectrum via FFT)
  • Vocabumonkey - Software focused on language and math skills
  • vnstat - Network traffic monitor that uses the /proc filesystem to get information
  • VNet - Turns a single-user VRML world into a multi-user environment
  • VNCTracker - A way to keep track of dynamic IP addresses for easy VNC connections.
  • vncsnapshot - Takes a snapshot from a VNC server and save it as a JPEG
  • VNCcrack - A fast VNC password cracker.
  • Vnc - Lets you view and interact with a remote desktop
  • VM - Mail reader for Emacs
  • vlorb - CD to Ogg Vorbis ripper and encoder
  • vloopback - Device driver that generates video pipes
  • vlogger - Logger daemon for Apache
  • VisualOS - An educational visual simulator of an operating system
  • visprint - A visual fingerprint generator.
  • VisoHotlink - Visohotlink is a php/MySQL script that helps you to detect and manage hotlinks of your files, but also referers.
  • Vision Egg - A program that produces visual stimuli for vision research experiments.
  • Vis5D+ - Enhanced version of the Vis5dscientific visualization tool
  • vim2html - Converts vim files to HTML
  • Vim - Editor
  • Vilno - data transformation, prepare data for analysis, use for statistics, reporting or ETL.
  • Vilistextum - HTML to text converter
  • vile - Vi-compatible text editor
  • viewglob - Provides additional shell information in graphical environments
  • vibtoolbox - Vibtoolbox is a set of command line tools for the analysis of vibration and acoustic test data.
  • VFU File Manager - Text-mode file manager
  • vexim - Manages multiple virtual mail domains
  • vevo - Software for writing video processor plugins
  • Vesta - Software configuration management system
  • Vertoo - Simple version support tool
  • Verbiste - A French conjugation system.
  • Ventilation - Journal Web site administration system
  • veejay - Video tracker/editing tool
  • ved - Small, fast screen-oriented text editor
  • Vectoroids - Vector-based asteroid-shooting game
  • vcp - Copies files and directories
  • VCD Imager - Free software (Super) video CD authoring solution - Part of the GNU Project
  • VBA Express - A VisualBoyAdvance frontend (to configure the emulator and play games easily).
  • Varnish - A high-performance HTTP accelerator.
  • Varkon - A parametric CAD-tool
  • Vallheru - A Web interface turn-based Polish MMORPG.
  • Valknut - DirectConnect client
  • Valgrind - Memory debugger
  • Vala - A compiler for the GObject type system.
  • Vacation - Email autoresponder
  • Micro Window-Gadgets - A lightweight windowing toolkit for C and X11.
  • OSSP uuid - Universally Unique Identifier (UUID) Toolkit
  • uucp - File copying program - Part of the GNU Project
  • utopia - The Utopia font family, including regular, italic, bold, and bold italic.
  • uSTL - a size-optimized STL implementation
  • uShare - Is a UPnP A/V Media Server.
  • userv - Security boundary tool - Part of the GNU Project
  • Userneu - Account management and creation tool
  • usermin - Web interface to *nix systems
  • Userinfo - Shows info about local users
  • Usenet Binary Harvester - A Perl script to find and download single and multi-part Usenet binaries.
  • Uschedule - Job scheduler
  • USBSink - A GNOME program for file synchronization over USB.
  • USBAuth - USBAuth provides passwordless authentication via USB storage devices.
  • Uri - Library that analyses and transforms URIs
  • upgrade.php - Provides PHP backward capability
  • updatedd - Client for updating a dynamic DNS
  • Info-ZIP- UnZip branch - Collection of archiving and compression tools
  • unrtf - Converts from RTF to other formats - Part of the GNU Project
  • unixODBC - Free implementation of the ODBC standard
  • Unix2tcp - Connection forwarder
  • Units - Unit conversion and calculation - Part of the GNU Project
  • Unit Circle - A program to show the relationship between angles and trigonometric functions.
  • Unison - File synchronizer
  • Uniread - Adds 'readline' support to any command line program
  • unieject - A multiplatform eject command.
  • Unicode Description Utilities - Utilities for analyzing Unicode-encoded text files
  • uni2ascii - A pair of programs that convert between Unicode and various 7-bit ASCII representations.
  • unac - Removes accents from strings
  • Umix - Adjusts soundcard volume and other features
  • UMFPACK - Routines for solving unsymmetric sparse linear systems
  • Umbrello UML Modeller - Creates diagrams of software and other systems
  • Ulim - Enforces resource limits on processes
  • UFTP - UFTP - UDP based FTP with multicast
  • ufraw - A utility to read and manipulate raw images from digital cameras.
  • fpm - Sets uniform permissions
  • UDT - A UDP-based data transfer library
  • udpcast - Install software via UDP multicast.
  • Ubuntu Center - A Web application for accessing your Ubuntu box online.
  • Uberkey - Keylogger for x86 systems
  • uTidyLib - Python wrapper for 'tidylib'
  • uControl - Tool for remapping keys
  • u61 - U61 is another block-based game.
  • u2nl - Listens on a TCP port and tunnels all connections transparently via an HTTPS proxy
  • typespeed - A typing speed tester.
  • txt2tags - Format conversion tool
  • Txt2man - Converts ASCII text to man page format
  • txt2graph.pl - Visualizes structures and dependencies between words
  • TwoLAME - An MPEG Audio Layer 2 encoder.
  • Twinkle - SIP VoIP Phone
  • Twin - Text-mode window environment
  • TWiki - Web-based collaboration platform
  • tvtime - TV and Video deinterlacer
  • tvmet -
  • tvlisting - Retrieves and displays TV listings from the Internet
  • TuxFighter - A shooter like Asteroids with Tux the penguin
  • TuxBank - A simple web based banking program
  • Tuxaator - Lightweight IRC bot/dictionary
  • Tutka - Tracker-style MIDI sequencer
  • Turtle Firewall - Firewall based on Linux kernel 2.4.x and iptables
  • Turma - A Gtk text search and replace utility.
  • tupd - Reports uptime statistics via HTTP
  • tumble - Converts TIFF (B&W only) and JPEG files into PDFs
  • Tulip - Produces large graphs
  • tub - Supports large dynamic arrays while still using shared libraries and dynamic linking
  • TTRM - Generator of musical arrays and search machine for pitch class sets
  • tthsum - Generates and checks TTH checksums
  • ttf2pt1 - Converts scalable and bitmapped fonts into PostScript Type 1
  • Tiny Tiny RSS - A Web-based AJAX news feed aggregator.
  • tstat - Collects performance indexes and statistical data about Internet traffic
  • tsemgr - Application to manage the Sony/Ericsson t68 mobile phone.
  • TimeSaver - A simple time management application.
  • TryChess - A multiplayer online chess game.
  • GNU trueprint - Prints source code to PostScript printers - Part of the GNU Project
  • Tripwire - Intrusion detection system
  • Trickle - Bandwidth shaper
  • TreeMaker - A program to desgin origami bases
  • tree - Recursive directory listing program
  • tree.pl - Creates sitemaps
  • Tree.hh - Templated tree class for C++
  • Trash Can - Command line recycle bin
  • Transmission - A lightweight BitTorrent client.
  • Transconnect - Lets users behind a proxy connect directly to the internet
  • transcode - Text console video-stream processing tool
  • tramp - Remote file editing software - Part of the GNU Project
  • 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.
  • Traindrive - A control program for model railroads.
  • Train Director - Train dispatch simulator
  • trafflogger - Conf-based traffic logger
  • tradeclient - E-mail client and PIM for X Window System
  • Trackballs - An arcade game similar to Marble Madness.
  • Traceroute - NANOG traceroute
  • Trac - Trac is an enhanced wiki and issue tracking system for software development projects.
  • tpp - Ncurses-based presentation tool
  • tpop3d - POP3 server
  • tpipe - Pipeline plumbing tool
  • pad - Small, lightweight text editor
  • ToutDoux - Project manager - Part of the GNU Project
  • Totem - The GNOME movie player
  • torrentocracy - An RSS aggregator and bittorrent downloader for MythTV.
  • TorK - A Tor Controller for KDE.
  • top - CPU usage display program
  • Tonality - Streamlines the B&W image conversion process
  • Tomboy - A linked note taking system
  • Tojo - Web-based collaborative journal system
  • togg - A simple Ogg Vorbis tag editor.
  • Tofuhunt - A "whats wrong with this picture?" game.
  • todolist.php - Web-based to do list
  • TOCHNOG - Finite element analysis program
  • TocaRaul! - A playlist manager intended to be used with icecast2 and ices2.
  • Toast - *nix package manager
  • tntnet - A Web application server for C++.
  • tnftp - Port of NetBSD's ftp program to other systems. Contains many advanced features compared to the traditional ftp program.
  • The Mana World - Project to create a free MMORPG
  • Tmv - Renames files/directories according to sed scripts
  • tlock - Terminal security program
  • tktimer - Is a program for recording elapsed time.
  • Tkhangman - GUI version of the classic 'hangman' game
  • tkgeomap - Tcl/tk commands for manipulating geographic data
  • TkDVD - A GUI for burning DVD+R/W -R/W discs.
  • tkdiff - Graphical diff and merge tool
  • Taekwon-Do Theory Assistant - A program that tests you on Taekwon-Do theory in preparation for your gradings.
  • tkabber - Jabber client
  • tk_Brief - GUI for facilitating letter writing using LaTeX
  • Tipograf - Frontend for a2ps
  • Tiobench - Threaded I/O bench for Linux
  • Tinyproxy - Lightweight HTTP proxy
  • TinyDoc - A documentation organizer
  • Tiny C Compiler -
  • Tiny SRP library - Stripped-down password authentication library
  • TinyDYN - Client and server software for dynamic DNS services
  • Tiny COBOL - COBOL compiler
  • TinTin++ - A console client to play MUDs.
  • tinc - Creates a secure private network between hosts
  • Tin - Text-based news reader
  • Timeshift - Performs calculations involving time
  • Timer Applet - A countdown timer applet for the GNOME panel.
  • Time - Reports the user, system, and real time used by a process - Part of the GNU Project
  • TightVNC - Enhanced version of VNC
  • Tiger - Performs security audits and acts as a host-based intrusion detection tool
  • tidylib - Library implementation of the 'tidy' program
  • tidy - Pulls out the significant entries from a group of standard entries
  • Thy - Lightweight HTTP daemon
  • Thunar - Light weight file manager
  • Thuban - Interactive GIS viewer
  • Threads - Library to make threading under C++ easier
  • Thought Bucket - A Web interface for storing random thoughts and ideas.
  • Theorur - A GTK2 GUI for Ogg/Theora live streaming.
  • Hitchhiker's Guide to the Internet - A German-speaking introduction to the technical aspects of the Internet.
  • Thumbnail AutoIndex - A thumbnail directory index generation PHP script.
  • Thales - IRC to MySQL gateway - Part of the GNU Project
  • tgrep - A grep for time specifications.
  • Tgif - Vector-based drawing tool that can pull drawings from the Web
  • Textutils - Text utilities
  • TextAnalyzer - Is a text analyzer tool that finds out words that are characteristic for a given input file.
  • Texinfo - Produces manuals, ASCII text, and on-line documentation - Part of the GNU Project
  • Tex2im - Converts LaTeX formulas into graphics
  • Testmail - Checks and filters email
  • Terraform - Fractal landscape generator/viewer
  • Termutils - Programs for controlling terminals - Part of the GNU Project
  • termlock - Blanks and locks a curses-compatible character terminal
  • terminatorX - Lets users "scratch" on digitally sampled audio data
  • Tent - PHP/SQL intranet application
  • Templeet - Template engine
  • tel - A little terminal-based phone book.
  • Teatime - Reminds you when your tea is ready
  • Teardrop - The personal meta search engine
  • tea - Simple editor that is particularly useful for HTML editing
  • Tdl - To-do list manager
  • Teacup - Helpdesk report management system
  • tcshrc - Config files that use the 'tcsh' shell
  • Tcsh - Shell compatible with the Berkeley shell
  • tcpxd - TCP/IP relay or proxy
  • tcptrack - Packet sniffer
  • Tcptraceroute - Traceroute implementation using TCP packets
  • Tcpspy - Logs information about incoming and outgoing connections
  • Tcpreplay - Lets users replay captured network traffic
  • TCP Re-engineering - Monitors and analyzes data transmitted via TCP
  • tcpdump - Tool for network monitoring and data acquisition
  • TCPDF - Is a Web-based assessment software well suited for both Internet and intranet environments.
  • tclpython - Lets users run Python code from within a TCL interpreter
  • tclperl - Lets users run Perl code from within a TCL interpreter
  • tclap - Simple library for parsing command line arguments
  • Tcl/Tk - Tcl/Tk scripting language
  • Tcl-tools - Tools for Tcl programmers
  • tbclock - A full-screen binary clock for the console terminal.
  • Taxbird - An Elster client (for German tax declarations).
  • Tau - Utility to track student attendance and scheduling
  • TaskFreak! - A simple to use but pretty and efficient task manager / todo list.
  • Tart - Backup utility
  • Tardy - Tar post-processor
  • GNU tar - Creates tar archives - Part of the GNU Project
  • TappyTux - An educational games suite for children.
  • Taper - Backup application
  • Tanne - Session management tool for HTTP
  • Tangerine - A music server using the DAAP protocol.
  • Tamil Encoding Converters - Programs for converting Tamil text among Unicode, ISCII, ITRANS, and TSCII
  • talkfilters - Translates English text into dialects - Part of the GNU Project
  • Tagreader - Reads HTML or XML files tag by tag
  • Tag Manager - IDE development library and utilities
  • taglog - Time and activity tracking application
  • taginfo - A small and simple MP3/Ogg/FLAC tag reader.
  • Tagclean - Maintains a collection of Ogg or MP3 files
  • tacshell - Drop-in replacement for sdshell
  • TabLaunch - A simple, lightweight, and cool-looking X application launch bar.
  • TA-Lib - A library of stock market technical analysis functions.
  • t337 - fast binary compression
  • t2t - Converts delimited text files to HTML tables
  • t-prot - Hides non-essential parts of emails and Usenet posts
  • systraq - Monitors a system and warns when system files change
  • Sysstat - The sar, mpstat, and iostat commands
  • sysprof - CPU profiler that profiles the entire system
  • syslog-ng - System logger that sorts based on message contents
  • sysindex - Provides information about system in both human and machine readable formats
  • sysfence - A system resources guard for GNU/Linux.
  • System call tracker - Intercepts and acts on system calls
  • syrep - Generic file repository synchronization tool
  • syntax-desktop - Web content management system
  • synergy2 - Lets users share a single mouse and keyboard between multiple computers
  • SyncEvolution - A tool that synchronizes addressbooks, calendars, and tasks lists with Evolution
  • Symposium - Simple chat application
  • Sympa - Mailing list manager
  • Symbio - Commenting system for Web sites and blogs
  • Sylpheed - GTK+ mail client
  • Syllogism Quizzer - This is a tool for learning syllogisms.
  • SXML - Defines and implements a mark-up language - Part of the GNU Project
  • Swpkg - Software packaging tools
  • Small Window Manager - Window manager for computers with little memory and small screens
  • Swish-E - Web site indexing software
  • SwiftSurf - HTTP proxy
  • swi-prolog - Comprehensive Prolog compiler and environment
  • swfw - Perl CGI Web page generator
  • Sweep - Sound wave editor
  • Sweater - Generic database front end
  • swbis - Extensions to the POSIX packaging standard - Part of the GNU Project
  • swapd - Dynamic swap creation daemon
  • sw-logger - GUI / cmd line stopwatch with many user-named lap timers. Save / restore CSV timing results; timer "runs" even when app isn't. Supports templates.
  • SVNAccess - A Web-based SVN access file manager.
  • svn2cl - Generates changelogs from a subversion repository
  • svk - Decentralized version control system
  • svg-to-png - Batch convert svg to png format
  • SVG-cards - A set of SVG playing cards.
  • sussen - Security scanner which remotely tests computers
  • Surfraw - Command line interface to the Web
  • 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.
  • surblhost - Command-line program that looks up hostnames in the Spam URI Realtime Blocklist (SURBL)
  • 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.
  • superopt - Finds the shortest instruction sequence for a given function - Part of the GNU Project
  • Super-sed - Enhanced version of the sed text editor
  • Sunclock - Clock for the X Window System
  • sugerplum - Automated spam-poisoner
  • Sudoscript - Provides an audited root shell
  • Sudoku Sensei - A sudoku explainer C/C++ library with sample programs.
  • sudo - Gives limited root privileges
  • Subversion - Version control system
  • Subterfugue - System call tracing and rewriting utility
  • Subnet Mask Calculator - A PHP script to calculate subnet masks.
  • Submount - Automatically mounts/unmounts removable media devices
  • Subedit palyer - movie player with codec pack
  • Styx - Scanner/parser generator
  • stvremote - STVRemote for GNU/Linux is a software designed to control the SBIG STV CCD autoguider.
  • Sturmbahnfahrer - A simulated obstacle course for automobiles.
  • Stunnel - SSL encryption wrapper
  • strongSwan - Implementation of IPsec for GNU/Linux
  • stripmgr - Expanded version of "DailyStrips"
  • Stress - Simulates certain types of stress of a system
  • strec - Lets you record streams as MP3s
  • Streamtuner - Stream directory browser
  • straw - Desktop news aggregator for the GNOME
  • Strace - Debugging tool
  • stow - Manages installation process - Part of the GNU Project
  • storebackup - Disk to disk backup tool
  • Stoned - Curling simulation
  • stl2pov - Reads an STL file and outputs a POVray mesh
  • Stitch - Backup utility
  • stickystatus - Displays the sticky and mouse key status in a popup image.
  • Wiki on a Stick - A self-modifying one-HTML-file personal wiki.
  • Stereograph - Stereogram generator
  • Stenciltools - Tools for text generation and manipulation
  • Staypuft - Staypuft marshmallow-style font
  • Stax - A collection of falling-block game
  • StatsDawg - A suite for monitoring various aspects of a GNU/Linux system using RRDTool and PHP.
  • StatistX - GTK-based statistics program
  • Statist - Statistics program
  • Statfink - A Fantasy (American) Football statistics grabber and live scoring program.
  • StatEye - Determines web site traffic
  • Stat - Displays information about a file
  • stardict-ed - Fork of the StarDict dictionary project
  • StandardizeIPA - This program translates "North American IPA" in UTF-8 Unicode into the standard International Phonetic Alphabet.
  • Stand Alone Tray - A stand-alone notification area.
  • Ssync - Filesystem synchronization utility
  • sshpass - A non-interactive SSH password authentication method.
  • SSHMenu - A GNOME panel applet menu for making SSH connections.
  • sshdfilter - Blocks ssh brute force attacks
  • ssh-installkeys - Exports SSH public keys to specified sites
  • Srm - Command line compatible rm
  • sredird - Lets you share a serial port throughout a network
  • srcpd - Daemon for the Simple Railroad Command Protocol (SRCP)
  • src-highlite - Turns source code into a file with syntax highlighting - Part of the GNU Project
  • SquirrelMail - E-mail reader
  • Squirrelfax - Receives and sends faxes
  • Squirrel Shell - System shell
  • squidrunner -
  • Squid - Web proxy cache
  • Squid Graph - Squid logfile analyzer and traffic grapher.
  • SqueakGtk - An attempt to port the Gtk+ GUI to Smalltalk Squeak.
  • Sqlupdate - Generates scripts for updating MySQL databases
  • sql2tinydns - Manages DNS information and dumps it to a tinydns datafile
  • sql2class - Converts output from 'mysqldump' to C++ classes
  • Spyce - Python-based Web scripting
  • sptrace - Secure ptrace() module
  • Spruce - Email client
  • Spotter - Lets students check answers to math and science questions
  • SportsTracker - A tool for recording sport activities.
  • Splonk - Spam eliminator
  • Spline - Akima spline interpolation
  • Splice - A label maker for CDs, DAT tapes, 8mm tapes, and analog cassette tapes.
  • Spinner - Keeps telnet and ssh links from dropping
  • spin_feedback - Manages the parameters of an (X)HTML form
  • spin_auth - Authentication wrapper
  • spell - Spell checker - Part of the GNU Project
  • speex - Speech compression format - Part of the GNU Project
  • Speedy Make - http://www.speedymake.com/speedymake.zip
  • SpeedX - Racing game - Part of the GNU Project
  • speedupd - Performs maintenance tasks on php syslog viewer's database.
  • SpeedCrunch - A fast and compact calculator.
  • speechd-el - Emacs speech output interface
  • Spat - Lightweight messaging application
  • Spastic - Set of Filters for email
  • Sparklet - A multiplayer networking game.
  • Spam Trainer - A drag and drop spam filter trainer for GNOME.
  • spamresponder - Spamfilter that combines C/R with DNS validation
  • spammergrok - A tool for extracting URLs from spam mail and wasting their bandwidth.
  • Spaminator - Web interface for sendmail's anti-spam functionality
  • Spamcup - Spamcop command-line tool
  • spacechart - Displays the stars in space in 3D - Part of the GNU Project
  • Space Maze - A shooting game going around and within a maze in space.
  • Soya - Soya (also known as Soya 3D) is a high-level object oriented 3D engine for Python
  • Sox - Converts between various audio formats
  • sourceinstaller - Graphical tool for source package configuration, installation, tracking and removal - Part of the GNU Project
  • Source2html - Formats source code into hyperlinked Web pages
  • Sound Monitor - Shows esound output
  • SoundConverter - Converts audio formats within GNOME
  • sos - Aid for a crude "switch on strings" in standard C
  • soothsayer - An intelligent predictive text entry platform.
  • soniK - A digital audio editor.
  • GNU Songanizer - Script to organize a directory containing ogg and mp3 files. - Part of the GNU Project
  • Sonance - A GNOME audio player based on GStreamer.
  • GNU Solfege - Eartraining program for GNOME - Part of the GNU Project
  • softflowd - Software flow-based network monitor
  • sofia-sip - Sofia-SIP is a SIP User-Agent library, compliant with the IETF RFC3261 specification.
  • Sofa Media Center - Sofa is a media center aimed at easy usage for GNOME.
  • Sodipodi - Vector drawing applications
  • Social Networks Visualiser - A social networks visualizer.
  • Socklog - Small, secure replacement for syslogd
  • Socat - Relay for bidirectional data transfer
  • Security Officers Best Friend (SOBF Tool) - An information security risk management tool.
  • Snug - Project to develop a free version of Java Swing - Part of the GNU Project
  • Snow Path Formation Simulator - Graphically displays the formation of paths in the snow formed by people.
  • Snowlog - Web server access log browser and analyzer
  • Snortalog - Summarizes Snort logs
  • snort2pf - Automatically blocks bad hosts
  • Snort-rep - Snort reporting tool
  • Snippets - CGI quote of the day script
  • Snif - Automatically creates directory listings
  • snescom - A 65c816 (SNES, etc.) assembler.
  • snd - Sound editor
  • Snatcher - Full-text search engine for Japanese or English text
  • Snapshot - Scripts for maintaining a repository of directory snapshots
  • SnapMatcher - An application to identify near-identical or similar images in large collections
  • SnapLogic - SnapLogic transforms data into Data services using a RESTful architecture and built in Python
  • Snackware - A game in which programmers compete with each other.
  • snack