I really recommend Atlassian's FishEye (similar to trac) and Crucible (peer code review, with a friendly forum-like twist) - both of which are tightly integrated - for anyone into some serious teamwork-based coding on SVN, CVS, Perforce, or several other version-managed development.

Fisheye: http://www.atlassian.com/software/fisheye/ Crucible: http://www.atlassian.com/software/crucible/

Atlassian's great about open source, and give free licenses to any non-profit or FOSS projects.