Ohloh
Similar
- Both are written in PHP and use a database such as MySQL
Different
- Feng Office is AGPL, Tiki is LGPL.
Openhub comparison
https://www.openhub.net/p/_compare?project_0=Feng+Office&project_1=Tiki+Wiki+CMS+Groupware
Contributors (All Time) click "View as graph"
Commits (All Time) click "View as graph"