Users may vote on questions that they would most like to see anwered. Users may rate answers. Answers displayed in a list box ordered by ratings. Users may subscribe to a FAQ question or category to be notified if a new answer is ever supplied or a new question added. Also, each bug report has a discussion box showing comments related to that bug.
Bugs can depend on each other, or on source code modules.
The bug reporter and any assigned developers are automatically subscribed for notifications about changes in the bug. Bug reports can be voted for. Bugzilla whining is a form of subscription. A simple kind of HOW-TO documentation telling developers how to do certain types of enhancements or contributions. The steps are basically a list box.