Lurker is a mailing list archiver capable of handling gigabytes of mail without slowing down and is designed to scale to support sites with thousands of concurrent users and hundreds of new messages per second.
KForge is an open-source (GPL) system for managing software and knowledge projects. It re-uses existing best-of-breed tools such as a versioned storage (subversion), a tracker (trac), and wiki (trac or moinmoin), integrating them with the system’s own facilities (projects, users, permissions etc). KForge also provides a complete web interface for project administration as well a fully-developed plugin system so that new services and features can be easily added.