Advogato
- An online community site dedicated to free software development. It contains articles, blogs, and an annotated list of free software projects.
Alioth - Welcome
- Hosts Debian-backed or Debian-led software projects and facilitates contributions from external developers.
BerliOS Developer
- A repository of open source projects; offers free access to CVS/SVN, mailing lists, bug tracking, message boards/forums, task management, site hosting, permanent file archive, full backups, and total web-based administration.
Dotfiles.com - Configuration File Heaven
- A central repository of configuration files (with preview and download for each) for editors, games, mail clients, shells, window managers, and X.
FSF/UNESCO Free Software Directory
- A useful directory of free software that runs under free operating systems particularly the GNU operating system and its GNU/Linux variants; organized by subject area.
Free Software Directory
- A comprehensive site of free software projects for Debian, Gnome, KDE, Linux Kernel Project as well as listings of projects by broad topic.
FreeGIS
- Software for free Geographic Information Systems (GIS).
Freshmeat.net - The source for Open Software
- Freshmeat maintains one of the largest archives of Linux software on the web. The first stop for Linux users hunting for the software they need for work or play.
GForge: Welcome
- GPLed successor to SourceForge's alexandria code; a repository of projects and code snippets.
Ibiblio Linux Archive
- A massive archive of Linux software and documentation; a free public library of Linux software.
IceWalkers - Linux Software
- A searchable database of Linux software and HOWTOs. Also includes security alert information.
KDE-Apps.org
- The primary KDE applications site; replaces APPS.KDE.COM.
KDE-Files.org
- THE site for downloading documents and templates for enhancing the KDE desktop.
Koders - Source Code Search Engine
- A huge database of source code searchable by programming language and license; coders are encouraged to contribute their project to the database
LUnIx . . . Linux CAD Links
- Collection of CAD software links for Linux; includes a brief description of software (with homepage link); information on license type, source code and binary packages.
Linux Box
- A database of software organized by subject area; site also has news and forums.
Linux Business Applications
- Directory of businesses that use Linux in their day-to-operations and a good place to find out about Linux in business; also availble in French.
MapTools.org
- A resource site for developers and users of open source mapping software; many mapping projects, organized by broad subject categories, are hosted on this site
SEUL - Simple End User Linux
- A hosting site for high-quality Linux applications primarily in education, science, and advocacy; also manages and coordinates communications between projects.
SGI Open Source Project List
- An annotated list of open source projects which have either originated within SGI, have SGI employees coordinating the development and maintaining the master trees, or have SGI employees as significant core contributors.
Savannah: Welcome
- A central point for development, distribution and maintenance of GNU Software; similar to SourceForge, but not as big.
SourceForge - Open Source Development Website
- The world's largest development and download repository of open source code and applications; provides free services to open source developers.
Swik
- A free and open database of Open Source projects; includes a search engine, a wiki for editing/adding entries and information-sharing tools that use Really Simple Syndication (RSS).
The ASM Software Homepage
- Lists of downloadable software for GNU/Linux, MS-DOS and compatibles, Atari ST.
The mozdev.org Homepage
- Free hosting service for the Mozilla community; software projects related to Mozilla and run on top of the software code being developed by mozilla.org.
Tuxfinder - Linux Search Tool
- A searchable database of Linux applications; includes distribution packages (Red Hat, Debian, and Slackware), software applications, and documentation. Also available in French.
Unmaintained Free Software
- A searchable database of unmaintained/orphaned free software projects, organized by category, which require a new maintainer.