freshmeat maintains the Web's largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat database, and links to new code are added daily.
Savannah is a central point for development, distribution and maintainance of Free Software. It allows contributors to easily join existing Free Software projects.
Dedicated to managing and promoting the Open Source trademark for the good of the community. Includes a definition of 'Open Source', and a list of approved licenses.
A collaboration and code hosting platform for software projects. Uses Bazaar as its version control system. Run by Canonical, the Company behind Ubuntu. Ubuntu's bugs are tracked here.