CodePlex is Microsoft's free open source project hosting site. You can create projects to share with the world, collaborate with others on their projects, and download open source software.
Free public repositories, collaborator management, issue tracking, wikis, downloads, code review, graphs and much more. Hosts developer libraries such as Ruby on Rails, IronRuby, jQuery, Perl
Google Developers is now the place to find all Google developer documentation, resources, events, and products. Open APIs and Google projects like Google Gears, Android, Chromium.
Launchpad is a software collaboration platform that provides bug tracking,code hosting using Bazaar, code reviews,Ubuntu package building and hosting, translations, and mailing lists.
Collection and sharing of data for scientific analysis of Internet traffic, topology, routing, performance, and security-related events is one of CAIDA's core objectives.
