I looked through the categories and didn't find 'Office/Business:Groupware'.
There's several that could apply, but only 3 are permitted on SourceForge.
Attached is the complete list.
Here's a few I did find and would like to know more about how users browse on SourceForge...
Topic :: Internet :: WWW/HTTP :: Dynamic Content :: Social Networking
Topic :: Internet :: WWW/HTTP :: Dynamic Content :: Wiki
Topic :: Office/Business :: Enterprise
Do users prefer going to a specific topic like Wiki/Blog/Social Networking or is a general top-level like Dynamic Content ok?