Well, my group's project is an open-source, freeware game development project.
I normally would not post in here and instead dig up all the information we need but am too tired. Pardon me!
We've been looking at Xaraya, Joomla, and countless other CMSes.
These are the most important features we need:
- an inbuilt or supported Wiki like MediaWiki(we'd prefer MediaWiki)
- custom user permissions. Disable anonymous browsing. (Drupal has it.)
- Multiple groups for each user. (Drupal has it.)