Open Source Applications
To learn more about Open Source Applications please visit the Texas Open Source Software site. You will be in a better position to understand why  Open Source Software is simply computer software that provides its users with specific freedoms that are not usually available with commercial or proprietary software. It's more than free cost. It's a philosophy of sharing and empowering all users. Categories below are based on the work of Open Source Living, and include:

Audio
Audio Players

Exaile Exaile

Exaile is a music player for GTK+ written in Python. It incorporatesfeatures such as automatic fetching of album art, handling of large libraries, lyrics fetching, artist/album information via Wikipedia, Last.fm submission support, and optional iPod support via a plugin.

Amarok Amarok

Amarok is the music player for Linux and Unix with an intuitive interface. Amarok makes playing the music you love easier than ever before - and looks good doing it.

Banshee Banshee

Import, organize, play, and share your music using Banshee’s simple, powerful interface. Banshee has been packaged for a variety of Linux distributions.

Songbird Songbird

Songbird is a desktop media player mashed-up with the Web. It provides a public playground for Web media mash-ups by providing developers with both desktop and Web APIs, developer resources and fostering Open Web media standards.

MusikCube MusikCube

MusikCube works well as an alternative to iTunes to manage your music collection. ” It helps you just listen to what you want to hear,while offering innovative features not seen elsewhere.”

MP3 & Audio Tools

Cdex CDex

CDex is a tool that enables you to extract digital data directly from an Audio CD into plain WAV files (useful for making compilation audio CDs) or compressed using an audio encoder.

Podcasting

Juice Juice

Juice is the premier podcast receiver, allowing users to capture and listen to podcasts anytime and create their own audio channels on the fly. Highly recommended application.

Podcast Generator Podcast Generator

Podcast Generator is a web based podcast publishing script that allows your to upload media files (audio-video) via a web form along with episode information to create a podcast feed.

Recording

Audacity Audacity

Audacity is open source software for recording and editing sounds. It is a solid cross-platform sound editor supporting mulitple formats with an intuitive graphic user interface.

Traverso DAW Traverso DAW

Traverso is a cross platform multitrack audio recording and editing suite, with an innovative User Interface. Its a complete solution from recording to CD mastering.



Ardour Ardour

Ardour is a digital audio workstation that you can use to record, edit and mix multi-track audio. It also allows you to produce CDs and mix video soundtracks, and it’s great for testing out new ideas about music and sound.

Rosegarden Rosegarden

Rosegarden is a professional audio and MIDI sequencer, score editor, and general-purpose music composition and editing environment. This is a strong contender when it comes to working with Midi.

Hydrogen Hydrogen

Hydrogen is an advanced drum machine for GNU/Linux. It’s main goal is to bring professional yet simple and intuitive pattern-based drum programming.

Bussiness Applications
CRM & ERP

Sugar Community Edition Sugar Community Edition

Commercial open source customer relationship management (CRM). CRM software for sales force automation and customer support deployed on demand or on site.

Compiere (Community Edition) Compiere (Community Edition)

Compiere Community Edition is an open source ERP solution for Distribution, Retail, Manufacturing and Service industries. Compiere automates accounting, supply chain, inventory and sales orders.

Help Desks

Liberum Help Desk

Liberum Help Desk is the complete help desk solution for small to medium sized businesses and organizations. This software provides a simple, easy to use web interface for managing and tracking technical support problems.



Networks

Insoshi Insoshi

Insoshi is an open source social networking platform built with Ruby on Rails. The project is currently under development but already boasts a solid feature set.

Elgg Elgg

Elgg is an open source social networking platform developed for LAMP (Linux, Apache, MySQL, PHP) which encompasses weblogging, file storage, RSS aggregation, personal profiles, FOAF functionality and more.

Project Management

ProcessMaker OSS ProcessMaker OSS

Open source workflow / business process management (BPM) software suite.

Project Pier Project Pier

ProjectPier is a self-hosted PHP application for managing tasks, projects and teams through an intuitive web interface. ProjectPier will help your organization communicate, collaborate and get things done.

Open Workbench Open Workbench

Open Workbench is a desktop application for project management and scheduling in which you can define a work breakdown structure, set dependencies and resource constraints, assign resources to tasks, auto schedule and then monitor progress.

Content Management
Blog Software

FlatPress FlatPress

FlatPress is an open source, standard compliant, multi lingual extensible blogging engine which does not require a database to work.

BlogEngine.NET BlogEngine.NET

BlogEngine.NET is an open source .NET blogging project that was born out of desire for a better blog platform. A blog platform with less complexity, easy customization, and one that takes advantage of the latest .NET features.

Serendipity Serendipity

Serendipity is a PHP-powered weblog application which gives the user an easy way to maintain an online diary, weblog or even a complete homepage.

Movable Type Movable Type

Movable Type is a professional weblog publishing platform developed by the company Six Apart.

LightNEasy LightNEasy

LightNEasy, a simple and light Content Management System and Website Builder. LightNEasy is not only a CMS, It actually creates plain, pure web pages for your whole website, making it SEO friendly and fast loading. Each time you add a page, alter the menus, it regenerates all pages again so that they remain fully integrated.

Web 2.0 News Portal Web 2.0 News Portal

Web 2.0 News Portal is a small and friendly Web 2.0 application for publishing News and Blog posts.

PixelPost PixelPost

Pixelpost is an open-source photoblog application for the web. It is standards-compliant, multi-lingual and fully extensible .

Habari Habari

Habari is a “next-generation free software blogging patform” still in development but backed by some of the web’s most respected coders and developers. Habari will grow to be something special.

Nucleus Nucleus

Nucleus CMS is an open-source blog management software package written in PHP, with a MySQL backend, it allows for multiple blogs and authors, easy publishing, commenting, RSS, archiving, search and more.

Textpattern Textpattern

Textpattern is a flexible, elegant and easy-to-use content management system optimised for blogging. Like most CMS, it is coded in php and requires a mysql database for operations.

Wordpress Wordpress

WordPress is a state-of-the-art semantic personal publishing platform with a focus on aesthetics, web standards, and usability. What a mouthful. WordPress is both free and priceless at the same time.

E-Learning

Docebo Docebo

Docebo is an e-Learning platform (LMS and LCMS) that supports 12 languages, is compliant to the SCORM 1.2 standard, and different didactic models. Including: Blended, Self-Directed, Collaborative and even Social Learning through Chat, Wiki, Forums etc.

Dokeos Dokeos

Dokeos is a learning management system used in more than 600 companies and public administrations to manage e-learning and blended learning programmes.

Claroline Claroline

Claroline is an Open Source eLearning and eWorking platform allowing teachers to build effective online courses and to manage learning and collaborative activities on the web.

Moodle Moodle

Moodle is a course management system - an Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities.



Forums

Yet Another forum Yet Another forum

YetAnotherForum.NET (YAF) is a Open Source discussion forum or bulletin board system for web sites running ASP.NET. The latest version is ASP.NET v2.0 with a Microsoft SQL Server backend. The full C# source code is available licensed as GPL.

PunBB PunBB

PunBB is a fast and lightweight PHP-powered discussion board. Its primary goals are to be faster, smaller and less graphically intensive as compared to other discussion boards.

MyTopix MyTopix

MyTopix is a discussion forum poised to compete with some of the other players in the bulletin board market. It has all the features you need to get a community up and started quick and nothing that you don’t.

Vanilla Vanilla

Vanilla is an open-source, standards-compliant, multi-lingual, fully extensible discussion forum software. It is extremely lightweight at only 386k! A perfect solution for a simple forum.

BbPress bbPress

bbPress comes from the creators of Wordpress, it is forum software with a focus on web standards, ease of use, ease of integration, and speed.

PhpBB phpBB

phpBB was launched in 2000 and has become one of the standard Open Source forums used worlwide. It has a large and highly customisable set of key features coupled with a standards compliant interface.

Library

Greenstone Greenstone

Greenstone is a suite of software for building and distributing digital library collections. It is not a digital library but a tool for building digital libraries. It provides a new way of organizing information and publishing it on the Internet or on CD-ROM in the form of a fully-searchable, metadata-driven digital library.

Koha Koha

Koha is the first open-source Integrated Library System (ILS). In use worldwide, its development is steered by a growing community of libraries collaborating to achieve their technology goals. Koha’s impressive feature set continues to evolve and expand to meet the needs of its user base.

Portals

Diferior Diferior

Diferior (different + superior) is a multi purpose CMS that comes with all the necessary tools to easily publish and organize content on the Net. It is capable of distributing files via BitTorrent, HTTP and FTP protocols, has built-in forums, a sophisticated user system and more.

Umbraco Umbraco

Umbraco is an Open Source CMS based on the ASP.NET framework with cross browser support and a rich feature set for developers, editors and designers.

OpenCMS OpenCMS

OpenCms is an open source content management system based on Java and XML technology. The fully browser based user interface features configurable editors for structured content with well defined fields.

TutorialMS TutorialMS

TutorialMS is a content management system that helps webmasters index and manage tutorials (written by them or by another site). It is designed so users can easily find the tutorial(s) they are looking for.



LightNEasy LightNEasy

LightNEasy, a simple and light Content Management System and Website Builder. LightNEasy is not only a CMS, It actually creates plain, pure web pages for your whole website, making it SEO friendly and fast loading. Each time you add a page, alter the menus, it regenerates all pages again so that they remain fully integrated.

Typo3 Typo3

TYPO3 is a free Open Source content management system for enterprise purposes on the web and in intranets. It offers full flexibility and extendability while featuring an accomplished set of ready-made interfaces, functions and modules.

Web 2.0 News Portal Web 2.0 News Portal

Web 2.0 News Portal is a small and friendly Web 2.0 application for publishing News and Blog posts.

CMS Made Simple CMS Made Simple

CMS Made Simple provides a fast and easy way to create a web site and manage its contents. Integrate blogs, forums, polls, shopping carts and much more with this comprehensive, hands on CMS.

Pligg Pligg

Symphony is a web publishing system for web developers in XML and XSLT. It is customisable and flexible and can be used for anything from a publishing environment to organising your website’s url structure.

Plone Plone

Plone is an open source CMS suited for an internal website or may be used as a server on the Internet, playing such roles as a document publishing system and groupware collaboration tool.

E107 E107

e107 is a CMS written in PHP and using the popular open source MySQL database system for content storage. It’s completely free, totally customisable and in constant development.

Joomla Joomla

Joomla! probably has the largest userbase for a CMS System. It is used to power everything from simple websites to complex corporate applications. Easy to install and manage, it has a vast amount of templates and plugins.

Drupal Drupal

Drupal is an open source content management platform with a powerful range of features that supprt a variety of websites from personal blogs to large community-driven websites.

Wikis

Twiki TWiki

TWiki is a sophisticated but easy to use structured wiki. With many available plugins, it allows end users to create their own web applications without needing to know how to program. Written in Perl, TWiki is typically deployed in enterprises.

Deki Wiki Deki Wiki

Deki Wiki is an easy to use and sophisticated wiki for authoring, aggregating, organizing, and sharing content. Deki Wiki is also a platform for creating collaborative applications, or adding wiki capabilities to existing applications.

PmWiki PmWiki

PmWiki is a cross-platform wiki-based system for collaborative creation and maintenance of websites written in the PHP coding language.

Wikka Wiki Wikka Wiki

WikkaWiki is a flexible, standards compliant and lightweight wiki engine written in PHP, which uses MySQL to store pages. Designed for speed, extensibility, and security.

DokuWiki

DokuWiki

DokuWiki is a standards compliant, simple to use Wiki, mainly aimed at creating documentation of any kind. It is targeted at developer teams, workgroups and small companies.

MediaWiki MediaWiki

MediaWiki is the information sharing software package that Wikipedia is built on. It is now used by several other projects of the non-profit Wikimedia Foundation and by many other wikis besides.

Documents
Note Taking

RubyRoom RubyRoom

Rubyroom is a full-screen text editor, created using Ruby on Rails that lets you concentrate on writing without any of the usual distractions of a computer environment.

Freemind Freemind

FreeMind is a free mind-mapping program written in Java. You can use it to keep track of projects, to set up a workplace for your PC but also for the Internet, it’s also good for essay writing and brainstorming.

BasKet Note Pads BasKet Note Pads

This nifty little app lets you take notes, add images, links etc on the fly you can then organise notes, tag them and quickly retrieve them for future reference.

PDF Creation

CC PDF Converter

The CC PDF converter is an application that enables you to create PDF documents from almost any application (Word, Excel, Internet Explorer and more). The CC PDF Converter also allows you to easily embed a creative commons license in your PDF file.

PDFCreator PDFCreator

PDFCreator is a free tool to create PDF files from nearly any Windows application. Create PDF’s and send them via email, encrypt them or merge multiple files into one PDF.

Personal Finance

Buddi Buddi

Buddi is a simple budgeting program targeted for users with little or no financial background. It allows users to set up accounts and categories, record transactions, check spending habits, etc.

GnuCash GnuCash

GnuCash is personal and small-business financial-accounting software, that allows you to track bank accounts, stocks, income and expenses.

TurboCASHTurboCASH

TurboCASH .7 is an accounting package distributed under General Public Licence (GPL). It is one of the world’s first fully-featured open source accounts packages for small business.

Money Manager Ex Money Manager Ex

This is solid cross-platform, easy-to-use personal finance software that helps you organize your finances and keeps track of where, when and how your money goes.

Word & Office Suites

RubyRoom RubyRoom

Rubyroom is a full-screen text editor, created using Ruby on Rails that lets you concentrate on writing without any of the usual distractions of a computer environment.

Bean Bean

Bean is a small, easy-to-use word processor (or rich text editor), designed to make writing convenient, efficient and comfortable. It was built for Mac OS X.

NeoOffice NeoOffice

NeoOffice is a full-featured set of office applications (including word processing, spreadsheet, presentation, and drawing programs) for Mac OS X.

Scribus Scribus

Scribus is a desktop publishing (DTP) application with some excellent page layout features and can be used as an alternative to Adobe PageMaker, QuarkXPress and Adobe InDesign.

Abiword Abiword

AbiWord is a word processor lighter and quicker than OpenOffice’s Writer. It’s compatible with Microsoft Word documents and OpenDocument Format too.

OpenOffice OpenOffice

Open Office is a similar office suite to Microsoft Office available on different platforms. It offers a complete range of applications to tackle all your office tasks: Writer, Calc, Base, Impress, Draw, Math, Quickstarter etc.

E-Commerce
Ads

OpenX OpenX

OpenX is a powerful ad serving solution that puts control over online advertising back in the hands of publishers.

Object Databases

Db4o db4o

db4o (database for objects) is a high-performance, embeddable open source object database for Java and .NET developers. Get a head start for your products by leveraging db4o’s cutting edge technology to achieve unprecedented levels of performance and flexibility.

Shopping Cart

PrestaShop PrestaShop

PrestaShop is a full-featured, cross-platform eCommerce shopping cart application for the Web 2.0 era. Open-source and Web-based (PHP5), PrestaShop is customizable, stable, and “weighs” only 2.2MB for a quick and easy installation.

FishCart FishCart

Fishcart is a catalog management system that includes multi-lingual support, customer information tracking, close out items, audio or video clips for products and integrates the UPS Online® Shipping Tools.

Ubercart Ubercart

Ubercart is a shopping cart and e-commerce suite built on top of the leading open source CMS, Drupal. It integrates with the Drupal core and other contributed systems to provide a shopping cart on top of your normal community or company website.

Zen Cart Zen Cart

Zen Cart is an online store management system. It is PHP-based, using a MySQL database and HTML components and provides support for many languages and currencies.

Statistics

GNU Octave GNU Octave

Octave is a free computer program for performing numerical computations which is mostly compatible with MATLAB. It is part of the GNU project.

PhpMyVisites phpMyVisites

phpMyVisites is a powerful software for websites statistics and audience measurements providing detailed of information on websites visitors, visited pages, software/hardware utilization, etc. The GUI Interface is fun and practical and the installation is entirely automated and very simple.

Piwik Piwik

Piwik is web analytics software that provides in-depth reports on your website visitors, your popular pages, search engine keywords, languages used and much more. It aims to be the OSS equivalent to Google Analytics.

Store Builder

Magento Magento

Magento is a professional eCommerce solution offering unprecedented flexibility and control. Magento’s modular architecture puts the control back in the hands of the online merchant and places no constraints on business processes and flow.

Entretainment
Maps

Nasa World Wind Nasa World Wind

“World Wind allows any user to zoom from satellite altitude into any place on Earth, leveraging high resolution LandSat imagery and SRTM elevation data to experience Earth in visually rich 3D, just as if they were really there.”

Movies

Route 66 - an American badDream Route 66 - an American badDream

Accompany three German hillbillies discovering the American culture on a weird road trip and see how they stumble into the American way of life as outsiders.

Stray Cinema Stray Cinema

Stray Cinema is an open source film. Users are able to download and re-edit raw footage from a film shot in New Zealand, providing people from all over the world with an opportunity to create their own version of the film.

Boy Who Never Slept Boy Who Never Slept

One of the world’s first full-length open source movies, Boy Who Never Slept tells the story of an insomniac writer who happens to meet a teenage girl online.

Elephants Dream Elephants Dream

Elephants Dream is the world’s first open movie, made entirely with open source graphics software such as Blender, and with all production files freely available to use however you please, under a Creative Commons license.

Music

LMMS LMMS

LMMS (Linux MultiMedia Studio) is a free alternative to popular (but commercial and closed- source) programs like FruityLoops/FL Studio, Cubase and Logic allowing you to produce music with your computer.

Frets on Fire Frets on Fire

Frets on Fire is a Finnish music video game created by Unreal Voodoo in which players use the keyboard to play along with scrolling on-screen musical notes to complete a song, and is a clone of the Guitar Hero video game series.

Screensavers

LotsaEscher LotsaEscher

This is a screensaver which displays an animated version of M.C. Escher’s Print Gallery drawing. It is based on work done by Hendrik Lenstra and Bart de Smit.

Electric Sheep Electric Sheep

Electric Sheep is a screen saver run by thousands of people all over the world, it communicates with other computers via the internet to share in creating morphing abstract animations known as “sheep”.

Stars & Planetarium

Stellarium Stellarium

Stellarium is a free open source planetarium for your computer that shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors.

Celestia Celestia

Celestia is the free space simulation that lets you explore our universe in three dimensions.Celestia is expandable, seamless and covers over 100, 000 stars.

File Transfer
Archiving

7-Zip 7-Zip

7-Zip is an file archiver program for windows. It supports packing and unpacking of 7z, ZIP, GZIP, BZIP2 and TAR format files and provides a better compression ratio than WinZip for ZIP and GZIP formats.

Chat Clients

Colloquy Colloquy

Colloquy is an advanced IRC, SILC & ICB client for Mac which adheres to OS X interface conventions. Colloquy has the look and feel of a quality Mac application.

Kmess KMess

KMess is a client to connect to the Microsoft MSN network, allowing you to chat with Windows Live Messenger users. It supports fast file transfers, display pictures, custom emoticons, and more.

Asterisk Asterisk

Asterisk is the world’s leading open source telephony engine and tool kit. Offering flexibility unheard of in the world of proprietary communications, Asterisk empowers developers and integrators to create advanced communication solutions.

Mercury IM Mercury IM

Mercury IM is a cross-browser Java MSN Messenger client. It is lightweight and customisable.

AMSN aMSN

aMSN is an open source MSN Messenger clone, with features such as: display pictures, custom emoticons, multi language, webcam support, full-speed file transfer, chat logs, conferencing support, event alarms and more.

Adium Adium

Adium is an instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.

Miranda Miranda

Miranda IM is an open-source multi protocol instant messenger client for Microsoft Windows. Designed to be resource efficient with a rich feature set, Miranda supports AIM, Jabber, ICQ, IRC, MSN, Yahoo and more.

Pidgin Pidgin

Pidgin is a multi-protocol Instant Messaging client that allows you to use all of your IM accounts at once. It works with the following: AIM, IRC, Yahoo!, MSN, MyspaceIM, ICQ, Zephyr and more.

File Sharing & Hosting

Cyberduck Cyberduck

Cyberduck is an open source FTP, SFTP, WebDAV and Amazon S3 browser with an easy to use interface, integration with external editors and support for many Mac OS X system technologies such as Spotlight, Bonjour, Quick Look and the Keychain.

DC++ DC++

DC++ is a client for Windows for the Direct Connect network. Direct Connect allows you to share files over the Internet without restrictions or limits. The client is completely free of advertisements and has a nice, easy to use interface.

Deluge Deluge

Deluge is a lightweight cross-platform BitTorrent client. Full-featured, it uses libtorrent in it’s backend and PyGTK for it’s user interface.

WinSCP WinSCP

WinSCP is an open source SFTP client and FTP client for Windows. Its main function is the secure file transfer between a local and a remote computer. Beyond this, WinSCP offers basic file manager functionality. It uses Secure Shell (SSH) and supports, in addition to Secure FTP, also legacy SCP protocol.

CC Publisher CC Publisher

ccPublisher will help you tag your audio and video files with information about your license and it allows you to upload Creative Commons-licensed audio and video works to the Internet Archive for free hosting.

Filezilla Filezilla

Filezilla is one of the most popular Open Source FTP solutions available and it has recently undergone an upgrade. It is reliable software with a user-friendly interface. Highly recommendable.

IRC

X-Chat X-Chat

A simple IRC client for Windows operating systems. Features coloured nicknames and alignment by text as opposed to by name.

Peer to Peer

SolarSeek SolarSeek

SolarSeek is a SoulSeek peer to peer client for Mac OS X. Uses bindings and Cocoa to give a clean, powerful interface.

Tribler Tribler

Tribler is an open source Peer-to-Peer feature packed client for watching videos online. It supports standard features such as key word searching for content and segmented downloading.

Shareaza Shareaza

Shareaza is a peer-to-peer file sharing client which supports the Gnutella, Gnutella2, eDonkey Network, BitTorrent, FTP and HTTP network protocols and handles magnet links, ed2k links, Piolet links, and the now deprecated Gnutella links.

Ktorrent KTorrent

KTorrent is a BitTorrent client written in C++ for the K Desktop Enivonment (KDE) using the Qt user interface toolkit. It is maintained in the KDE Extragear.

FrostWire FrostWire

FrostWire, is a super fast Gnutella Peer-to-Peer client with PRO connections from LimeWire PRO. It is spyware and adware free, includes iTunes integration, firewall to firewall transfers, Bit Torrent support and more…

Deluge Deluge

Deluge is a lightweight cross-platform BitTorrent client. Full-featured, it uses libtorrent in it’s backend and PyGTK for it’s user interface.

Ares P2P Ares P2P

Ares is a file sharing program that enables users to share any digital file including images, audio, video, software, documents, etc.

Peer Guardian 2 Peer Guardian 2

PeerGuardian 2 is an IP blocker for Windows that integrates support for multiple lists, list editing, automatic updates, and blocking all of IPv4, making it the safest way to protect your privacy on P2P.

Transmission Transmission

Transmission is a lightweight yet powerful BitTorrent client with a simple, intuitive interface designed to integrate tightly with whatever computing environment you choose to use.

Gnucleus Gnucleus

Gnucleus is a Windows application for accessing file shares on the Gnutella and G2 networks.

Azureus Azureus

Azureus implements the BitTorrent protocol using java language and comes bundled with features such as multiple torrent downloads, advanced seeding, cache adjustment and more.

Emule eMule

Emule is a reliable peer-to-peer file sharing client that features a queue and credit system, intelligent corruption control, file preview function, user categories, a wide file search array and much more.

Limewire Limewire

Limewire is a fast and lightweight File Sharing program that supports Bittorrent downloads. It is spyware and adware free and works behind firewalls.

Games
Action

BZFlag BZFlag

BZFlag is a free online multiplayer cross-platform open source 3D tank battle game. The name originates from “Battle Zone capture the Flag”. It runs on Irix, Linux, *BSD, Windows, Mac OS X, and many other platforms.

Frets on Fire Frets on Fire

Frets on Fire is a Finnish music video game created by Unreal Voodoo in which players use the keyboard to play along with scrolling on-screen musical notes to complete a song, and is a clone of the Guitar Hero video game series.

Classic

Frozen Bubble Frozen Bubble

Frozen Bubble is a superb open source rendition of the classic arcade title ‘Bust a Move’. This version features single and multiplayer modes as well as network multiplayer and level editor capabilities.

Secret Maryo Chronicles Secret Maryo Chronicles

Secret Maryo Chronicles is an Open Source two-dimensional platform game with a style designed similar to classic sidescroller games.

SuperTux SuperTux

SuperTux is a classic 2D jump’n run sidescroller game in a style similar to the original SuperMario games. The Milestone1 release of SuperTux features 9 enemies, 26 playable levels, software and OpenGL rendering modes, configurable joystick and keyboard input, new music and completly redone graphics.

Open Yahtzee Open Yahtzee

Open Yahtzee is an open-source version of the classic dice game Yahtzee. It is built to work across many different operating systems and platforms.

FPS

OpenArena OpenArena

OpenArena is an open source first-person shooter game based on the ioquake3 fork of the id tech 3 engine. OpenArena’s gameplay is the exact same as Quake III Arena - score frags to win the game using a balanced set of weapons each designed for different situations.

Warsaw Warsaw

Warsow is a free standalone first person shooter game for Windows and Linux. It is based on the Qfusion 3D engine (a modification of the Quake 2 GPL engine), and aimed on the competitive scene, or the e-sports community.

Alien Arena 2008 Alien Arena 2008

Alien Arena a fast and frantic first person shooter that combines the best of gameplay from games like Unreal Tournament and Quake III.

Savage Savage

Savage: The Battle for Newerth is a fantasy/science fiction computer game that combines aspects of Real-time strategy and First-person shooter into one game. The producers of the game define it as a ‘Real Time Strategy Shooter’, or ‘RTSS’. It takes place in the far future when man has (after an apocalypse) rebuilt society, but is threatened by intelligent beasts.

Sauerbraten Sauerbraten

Sauerbraten (a.k.a. Cube 2) is a free multiplayer/singleplayer FPS, built as a major redesign of the Cube FPS. The aim of this game is to allow map/geometry editing to be done dynamically in-game, to create fun gameplay and an elegant engine

Nexuiz Nexuiz

Nexuiz focuses on bringing the FPS genre back to the basics with quick, lethal battles and balanced weaponry. As of the current release there are 9 weapons and 24 official maps, as well as 15 player models, with an average of 2 skins each.

Tremulous Tremulous

Tremulous blends a team based FPS with elements of an RTS. Players can choose from 2 unique races, aliens and humans. Players on both teams are able to build working structures in-game like an RTS.

Platform

Irrlamb irrlamb

irrlamb is a platform game, in which the player moves a ball through a 3D terrain, it involves a lot of physics and challenging gameplay!

Wormux Wormux

Wormux is a free and open-source clone of the classic game Worms. The teams are styled after the mascots of various free software projects, such as GNU, Linux, FreeBSD, KDE, GIMP, OpenOffice.org, Firefox, Thunderbird, Workrave, NuFW and SPIP.

Simulation

LinCity NG LinCity NG

LinCity-NG is a 3D City building Simulation Game for Linux-based operating systems. It is a polished and improved version of the classic LinCity game.

FlightGear Flight Simulator FlightGear Flight Simulator

FlightGear is an open-source, multi-platform, cooperative flight simulator project featuring 20, 000 real world airports, correct runway markings and placements, world scenary, accurate terrain and more.

Strategy

Freeciv Freeciv

Freeciv is a Free and Open Source empire-building strategy game inspired by the history of human civilization. The game commences in prehistory and your mission is to lead your tribe from the stone age to the space age…

Scorched 3D Scorched 3D

Scorched 3D is a turn-based artillery game modeled after the classic DOS game Scorched Earth “The Mother Of All Games”.

Battle for Wesnoth Battle for Wesnoth

The Battle for Wesnoth is a turn-based strategy game with a fantasy theme. Fight a desperate battle to reclaim the throne of Wesnoth, or take hand in any number of other adventures.

Graphics and Photo
3D Modeling

Wings 3D Wings 3D

Wings 3D is a free and open source polygon mesh subdivision modeller ideally suited for modeling and texturing low to medium density polygon meshes. It has a wide range of very effective tools optimised for these tasks hidden behind its ‘minimalistic’ interface.

Axel Axel

Axel is an algebraic geometric modeler which aims to provide “algebraic modeling” tools for the manipulation and computation with implicit and parametric curves or surfaces.

POV-Ray POV-Ray

The Persistence of Vision Raytracer, or POV-Ray, is a cross platform ray tracing program for creating stunning three-dimensional graphics.

Ogre Ogre

OGRE (Object-Oriented Graphics Rendering Engine) is a scene-oriented, flexible 3D engine written in C++ designed to make it easier and more intuitive for developers to produce applications utilising hardware-accelerated 3D graphics.

OpenFX OpenFX

OpenFX is an Open-Source 3D modeling, animation and rendering suite created by Dr. Stuart Ferguson. Its powerful feature-set includes a full renderer and raytrace engine, NURBS support, kinematics-based animation, morphing, and an extensive plugin API.

Art of Illusion Art of Illusion

Art of Illusion is a 3D modelling and rendering studio. It is written entirely in Java, and should be usable on any Java Virtual Machine.

Crystal Space Crystal Space

Crystal Space is a free cross-platform software development kit for realtime 3D graphics and in particular games. Officially supports Linux, OSX and Windows.

Blender Blender

Blender is a respected 3D content creation suite, available for all major operating systems and distributed under GPL licensing. Create models, shade, animate and make interactive 3D.

Other

ImgSeek imgSeek

imgSeek is a photo collection manager and viewer with content-based search and many other features. The query is expressed either as a rough sketch painted by the user or as another image you supply (or an image in your collection).

Photo Editing

Mtpaint mtpaint

MTPaint is a light-weight graphics editor and paint program for Windows and Linux that comes with an interesting feature set.

PosteRazor PosteRazor

The PosteRazor cuts a raster image into pieces which can afterwards be printed out and assembled to a poster.

Seashore Seashore

Seashore is an open source image editor for Mac OS X’s Cocoa framework. It features gradients, textures and anti-aliasing for both text and brush strokes.

Xara Xtreme Xara Xtreme

Xara Xtreme for Linux is a powerful, general purpose graphics program for Unix platforms including Linux, FreeBSD and (in development) OS-X.

Hugin Hugin

Hugin is an easy to use cross-platform panoramic imaging tool. You can assemble a mosaic of photographs into an immersive panorama image, stitch any series of overlapping pictures and much more.

Paint.NET Paint.NET

Paint.NET is free image and photo editing software for Windows operating systems. It’s many features include features an intuitive user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools.

Gimp Gimp

GIMP is the definitive GNU image manipulation software, ideal for tasks such as photo retouching, image composition and image authoring. It works across most operating systems and is delivered in a variety of different languages.

Screen Capture

Zscreen ZScreen

ZScreen is an open-source screen capture program that allows for region, window, and full-screen screenshots. It can FTP screenshots and put the URL in your clipboard in a single keystroke.

Vectors

Inkscape Inkscape

Inskscape is a great vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.

Video
DVD Burning

DVD Flick DVD Flick

DVD Flick aims to be a simple but at the same time powerful DVD Authoring tool. It can take a number of video files stored on your computer and turn them into a DVD that will play back on your DVD player, Media Center or Home Cinema Set. You can add additional custom audio tracks as well as subtitles of your choice.

InfraRecorder InfraRecorder

InfraRecorder is a CD/DVD burning solution for Microsoft Windows. It offers a wide range of powerful features; all through an easy to use application interface and Windows Explorer integration.

HandBrake HandBrake

HandBrake is a multi-platform, multi-threaded DVD to MPEG-4 converter. Includes the feature to burn and create ISOs, as well as a multilingual interface.

MediaCoder MediaCoder

MediaCoder is a universal batch media transcoder, which integrates most popular audio/video codecs and tools into an all-in-one solution. This app benefits from regular codec and tool updates and support for new devices.

Media Players

XBMC for OSX XBMC for OSX

XBMC for OSX is a port of Xbox Media Center to Mac Os Leopard on Intel Machines. XBMC can play a very complete spectrum of of multimedia formats, and featuring playlist, audio visualizations, slideshow, and weather forecast functions, together with a multitude of third-party plugins.

MediaPortal MediaPortal

MediaPortal is an OS application that can turn your PC / TV into an advanced Media Center. You can listen to your favorite music & radio, watch and store your videos and DVDs, view, schedule and record live TV as a digital video recorder and more.

Media Player Classic (MPC) Media Player Classic (MPC)

Media Player Classic is a light-weight media player for Windows. It has a built in DVD player with real-time zoom, support for AVI subtitles, QuickTime and RealVideo support (requires QT and/or Real player), and lots more.

Mplayer MPlayer

MPlayer is a straight forward media player that runs across most systems and will play pretty much any type of video you throw at it. Reliable and stable, this is as good a media player solution as any.

VLC VLC

VLC media player is a highly portable multimedia player for various audio and video formats (MPEG-1, MPEG-2, MPEG-4, DivX, mp3, etc) as well as DVDs, VCDs, and various streaming protocols.

Miro Miro

Miro is much more than just Internet TV, the application plays nearly any video file, offers thousands of TV channels, the ability to download torrents and all this in a very striking interface.

Screencasts

CamStudio CamStudio

CamStudio is able to record all screen and audio activity on your computer and create industry-standard AVI video files and using its built-in SWF Producer can turn those AVIs into lean, mean, bandwidth-friendly Streaming Flash videos (SWFs).

Video Editing

LIVES LIVES

LiVES is an Open Source video editor and VJ tool for Mac and Linux that mixes realtime video performance and non-linear editing in one application.

Kino Kino

Kino is a non-linear DV editor for GNU/Linux. It features excellent integration with IEEE-1394 for capture, VTR control, and recording back to the camera. It captures video to disk in Raw DV and AVI format, in both type-1 DV and type-2 DV (separate audio stream) encodings.

Vivia Vivia

Vivia is a video editing program for Linux and Windows. It provides extremely easy editing of clips and transitions in real-time, along with multi-camera support for editing scenes that were recorded by more than one camera simultaneously.

VirtualDub VirtualDub

Streamlined for fast linear operations, Virtual Dub is a video capture/processing utility for 32-bit Windows platforms. It has batch-processing capabilities and can be extended with third-party video filters.

Avidemux Avidemux

Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs.

Jashaka Jashaka

Jahshaka is a video and film compositing, editing and special fx system that uses OpenGL & OpenML hardware rendering to give operators real time interactivity. The system is cross platform, and also includes full CG, paint and image processing modules.

Web Development
Authoring

Code Igniter Code Igniter

CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a toolkit to create full featured web applications. It provides a rich set of libraries for commonly needed tasks, accessible via a simple interface and logical structure.

Netbeans Netbeans

NetBeans is both a platform for the development of Java desktop applications, and an integrated development environment (IDE) developed using the NetBeans Platform.

Python Python

Python is a dynamic object-oriented programming language that can be used for many kinds of software development. It offers strong support for integration with other languages and tools, comes with extensive standard libraries, and can be learned in a few days.

WxWidgets wxWidgets

wxWidgets (formerly wxWindows) is a widget toolkit for creating graphical user interfaces (GUIs) for cross-platform applications. wxWidgets enables a program’s GUI code to compile and run on several computer platforms with minimal or no code changes.

Sapid CMF Sapid CMF

SAPID CMF is a framework for the rapid creation of content-based Web 2.0 generation applications. It allows you to organize the process of new application development, data, structures, representation and functionality components with a rich GUI.

K Desktop Environment K Desktop Environment

K Desktop Environment (KDE) aims to be a powerful system for an easy-to-use desktop environment. The KDE project serves as an umbrella project for many standalone applications and smaller projects that are based on KDE technology. These include KOffice, KDevelop, Amarok, K3b and many others.

Easy Eclipse Easy Eclipse

EasyEclipse packages together Eclipse, the open-source software development platform, and selected open source plugins. EasyEclipse’s primary purpose is to provide easy-to-install and -use distributions of Eclipse, rather than develop new code.

Eclipse Eclipse

Eclipse is an open-source Integrated development environment (IDE) written primarily in Java. In its default form it is meant for Java developers, consisting of the Java Development Tools (JDT). Eclipse also offers a wide range of other Open Source framework tools.

OpenLaszlo OpenLaszlo

OpenLaszlo is an open source platform for creating zero-install web applications with the user interface capabilities of desktop client software.

CakePHP CakePHP

CakePHP enables PHP users at all levels to rapidly develop robust web applications. It is simple and fast to set up with an emphasis on clean code and best practices.

Ruby on Rails Ruby on Rails

Ruby on Rails is a free web application framework designed to make web development faster, simpler and more efficient. Often shortened to Rails, or RoR, Ruby on Rails is written in the Ruby programming language.

Django Django

Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design.

Aptana Jaxer Aptana Jaxer

Jaxer is the world’s first true Ajax server. HTML, JavaScript, and CSS are native to Jaxer, as are XMLHttpRequests, JSON, DOM scripting, etc. And as a server it offers access to databases, files, and networking, as well as logging, process management, scalability, security, integration APIs, and extensibility.

Aptana Studio (Community Edition) Aptana Studio (Community Edition)

Aptana Studio’s community edition is the free, open source Web development environment optimized for use with Ajax libraries and scripting languages like JavaScript, Ruby and PHP. Aptana Studio is considered by many devleopers the best-in-class authoring environment for today’s more rich and interactive Web pages and Ajax applications.

NVU NVU

NVU is a Web Authoring System for Linux, Windows and Mac that rivals programs like FrontPage and Dreamweaver. Nvu (which stands for “new view”) allows you to manage and create web pages with no technical expertise or knowledge of HTML.

Editors

Firebug Firebug

Firebug integrates with Firefox to put a wealth of web development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page.

Smultron Smultron

Smultron is a free text editor for Mac OS X Leopard 10.5 which is both easy to use and powerful. It is designed to not confuse newcomers nor disappoint advanced users.

GNU Emacs GNU Emacs

GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing.

SciTE SciTE

SciTE is a SCIntilla based Text Editor. Originally built to demonstrate Scintilla, it has grown to be a generally useful editor with facilities for building and running programs.

Aptana Studio (Community Edition) Aptana Studio (Community Edition)

Aptana Studio’s community edition is the free, open source Web development environment optimized for use with Ajax libraries and scripting languages like JavaScript, Ruby and PHP. Aptana Studio is considered by many devleopers the best-in-class authoring environment for today’s more rich and interactive Web pages and Ajax applications.

NVU NVU

NVU is a Web Authoring System for Linux, Windows and Mac that rivals programs like FrontPage and Dreamweaver. Nvu (which stands for “new view”) allows you to manage and create web pages with no technical expertise or knowledge of HTML.

KompoZer KompoZer

KompoZer is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing.

Amaya Amaya

Amaya is a Web editor/Browser, i.e. a tool used to create and update documents directly on the Web. Browsing features are seamlessly integrated with the editing and remote access features in a uniform environment. This follows the original vision of the Web as a space for collaboration and not just a one-way publishing medium.

Notepad++ Notepad++

Notepad++ is a source code editor and Notepad replacement, which supports several programming languages and runs under the MS Windows environment. Its features include syntax highlighting, WYSIWYG, auto-completion, multi document/view and more.

Flash

Flash Develop Flash Develop

FlashDevelop is a .NET open source script editor designed mostly for Actionscript 2/3 development. FlashDevelop is very quick to setup and easy to use as an external editor for the Flash IDE or as a complete open source development environment.

Swfmill swfmill

swfmill is an xml2swf and swf2xml processor with import functionalities. It’s most common use is the generation of asset libraries containing images (PNG and JPEG), fonts (TTF) or other SWF movies for use with MTASC- or haXe-compiled ActionScript.

Java

JasperReports JasperReports

JasperReports is an open source Java reporting tool that can write to screen, to a printer or into PDF, HTML, Microsoft Excel, RTF, ODT, Comma-separated values and XML files.

Db4o db4o

db4o (database for objects) is a high-performance, embeddable open source object database for Java and .NET developers. Get a head start for your products by leveraging db4o’s cutting edge technology to achieve unprecedented levels of performance and flexibility.

Easy Eclipse Easy Eclipse

EasyEclipse packages together Eclipse, the open-source software development platform, and selected open source plugins. EasyEclipse’s primary purpose is to provide easy-to-install and -use distributions of Eclipse, rather than develop new code.

Eclipse Eclipse

Eclipse is an open-source Integrated development environment (IDE) written primarily in Java. In its default form it is meant for Java developers, consisting of the Java Development Tools (JDT). Eclipse also offers a wide range of other Open Source framework tools.

MooTools MooTools

MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer.

MYSQL & PHP

Madeam Madeam

Madeam is a rapid application development PHP MVC Framework. It allows quick prototyping and deployment of web applications by harnessing the power of Active Record, Convention Over Configuration, REST and PHP 5.

SQLite SQLite

A compiled database engine which can be called by python, c, and numerous languages, with very low overhead but advanced features like multithreading.

CakePHP CakePHP

CakePHP enables PHP users at all levels to rapidly develop robust web applications. It is simple and fast to set up with an emphasis on clean code and best practices.

PhpMyAdmin phpMyAdmin

phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web. It can create and drop databases, create/drop/alter tables, delete/edit/add fields, execute any SQL statement, manage keys on fields.

PHP PHP

PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. This is the main PHP website and is the starting point for all things PHP.

References

The Apache Software Foundation The Apache Software Foundation

The Apache Software Foundation provides support for the Apache community of open-source software projects. Its projects are characterized by a collaborative, consensus based development process, an open and pragmatic software license, and a desire to create high quality software that leads the way in its field.

Web++
Email

Claws mail Claws mail

Forked from the light-weight slypheed e-mail client, Claws Mail is a cross platform email client with a lot of interesting features including support for RSS and newsgroups.

Mozilla Thunderbird Mozilla Thunderbird

Organize, secure and customize your email with Thunderbird - a solid application, tried, tested and used widely.

Misc

VirtualBox VirtualBox

innotek VirtualBox is a general-purpose full virtualizer for x86 hardware. Targeted at server, desktop and embedded use, it is now the only professional-quality virtualization solution that is also Open Source Software.

Domain Hunter

Domain Hunter is a simple application to monitor the state of a list of domain names. Changes in the status of a monitored domain can be sent to an email address or the domain information can be obtained on demand through a Web interface.

FOG FOG

Free Open Source Computer Cloning Solution.

Wine Wine

Wine is an Open Source implementation of the Windows API on top of X, OpenGL, and Unix.

Operating Systems

PC/OS PC/OS

PC/OS is an open source operating system that concentrates on bringing ease of use and unsurpassed desktop performance to the client desktop and Server arena.

Debian GNU/Linux Debian GNU/Linux

Debian is an operating system that uses the Linux kernel and toolsfrom the GNU project; hence the name Debian GNU/Linux.

FreeBSD FreeBSD

FreeBSD® is an advanced operating system for x86 compatible (including Pentium® and Athlon™), amd64 compatible (including Opteron™, Athlon™64, and EM64T), UltraSPARC®, IA-64, PC-98 and ARM architectures.

NetBSD NetBSD

NetBSD is a free, secure, and highly portable Unix-like Open Source operating system available for many platforms, from large-scale server systems to powerful desktop systems to handheld and embedded devices.

OpenBSD OpenBSD

OpenBSD is a multi-platform 4.4BSD-based UNIX-like operating system with an emphasis on portability, standardization, correctness, proactive security and integrated cryptography.

Pardus Pardus

Pardus is a GNU/Linux distribution funded and developed by the Scientific & Technological Research Council of Turkey. It is an operating system designed around the premise of ‘ease of use’ and it also has somewhat of a ‘fun’ feel to it.

Dreamlinux Dreamlinux

Dreamlinux is a modern and modular Linux system that can be run directly from the CD and optionally be easily installed onto your Hard Drive.

EyeOS eyeOS

eyeOS is an Open Source Operating System in which everything resides on a web browser. It allows you to access your desktop, applications and files whevere you have an Internet connection.

Xmonad xmonad

xmonad is a tiling window manager for X11 offering stable and fast tiling. xmonad is customisable with a large extension library and offers extensive documentation for support and hacking.

GHC GHC

GHC is a state-of-the-art, open source, compiler and interactive environment for the Haskell programming language.

Haiku Haiku

Haiku is currently in development and aims to be a free operating system that provides users of all levels with a personal computing experience that is simple yet powerful, and free of any unnecessary complexities.

Solaris Solaris

Solaris is Sun Microsystems’ UNIX-based operating system with roots in the BSD operating system family. It supports SPARC-based and x86-based workstations and servers from Sun and other vendors.

Ubuntu Ubuntu

Ubuntu, from the Zulu meaning ‘humanity to others’, is a community developed, Linux-based operating system with a rapidly growing user base. It contains all the applications you need - a web browser, presentation, document and spreadsheet software, instant messaging and much more.

Linux Linux

Developed by Linus Torvalds, Linux is the kernel at the heart of all Linux based operating systems. The Linux core is available in several formats known as ‘distributions’ - each distribution has its own set of features and functionality that makes it unique.

RSS

Liferea Liferea

Liferea (Linux Feed Reader) is a GTK desktop news aggregator for online news feeds and weblogs. The project focus is on simplicity and easy installation.

Vienna Vienna

Vienna is an RSS/Atom newsreader with article storage and management via an SQLite database, built for Mac OS X.

RSSOwl RSSOwl

A solid cross-platform RSS client that lets you gather, organize, update, and store information from any RSS Feed in a convenient, easy to use interface

Security

Eraser Eraser

Eraser is an advanced security tool (for Windows), which allows you to completely remove sensitive data from your hard drive by overwriting it several times with carefully selected patterns.

True Crypt True Crypt

TrueCrypt is a software application used for on-the-fly encryption (OTFE). It can create a “file-hosted container” or write a partition which consists of an encrypted volume with its own file system, contained within a regular file, which can then be mounted as if it were a real disk.

Xpy xpy

xpy is a small tool which disables the default threats of a Windows XP installation. Besides disabling Windows and some of its components to communicate with Microsoft servers, xpy improves privacy settings and your system’s security.

KeePass KeePass

KeePass is a free/open-source password manager or safe which helps you to manage your passwords in a secure way. You can put all your passwords in one database, which is locked with one master key or a key-disk.

GNU Privacy Guard GNU Privacy Guard

GnuPG allows to encrypt and sign your data and communication, features a versatile key managment system as well as access modules for all kind of public key directories.

Darik’s Boot and Nuke (DBAN)

DBAN is a program designed to securely erase a hard disk until data is no longer recoverable, by overwriting the data with random numbers.

Password Safe Password Safe

Password Safe allows you to safely and easily create a secured and encrypted user name/password list. With Password Safe all you have to do is create and remember a single “Master Password” of your choice in order to unlock and access your entire user name/password list.

ClamWin ClamWin

ClamWin is a Free Antivirus program for Microsoft Windows 98/Me/2000/XP and 2003. It features a high detection rate for viruses and spyware, scanning scheduler, automatic downloads of updated virus databases and more.

Web Browsers

Flock Flock

Flock is a cross platform web browser built on Mozilla’s Firefox codebase. It is well known for its ‘web 2.0′ fatures, seamlessly integrating social media and networking services such as Facebook, YouTube, Twitter, Flickr, Blogger, etc.

Sea Monkey Sea Monkey

Sea Monkey is an all in one web-browser, advanced e-mail and newsgroup client, IRC chat client, and HTML editing suite.

Amaya Amaya

Amaya is a Web editor/Browser, i.e. a tool used to create and update documents directly on the Web. Browsing features are seamlessly integrated with the editing and remote access features in a uniform environment. This follows the original vision of the Web as a space for collaboration and not just a one-way publishing medium.

K-Meleon K-Meleon

K-Meleon is an extremely fast, customizable, lightweight web browser for the Win32 (Windows) platform based on the Gecko layout engine.

Camino Camino

Built for Mac, Camino provides the visual and behavioural experience central to Macs plus the powerful web-browsing capabilities of Mozilla Foundation’s Gecko rendering engine.

Mozilla Firefox Mozilla Firefox

The most widely used open-source browser, Firefox includes an easy tab system, pop-up blocking, custom themes, and plugins. Over the past couple of years it has become the browser of reference.