• bitbucket:  https://bitbucket.org/
• github:  https://github.com/
• google:  http://code.google.com/
• CodePlex:  http://www.codeplex.com/
• SourceForge:  http://sourceforge.net/

See Also

•  http://en.wikipedia.org/wiki/Comparison_of_open_source_software_hosting_facilities
• HelpWanted
• RelatedProjects
• WikiStart