Modifications to forum software
Just got off the phone with a customer, he wants a custom forum software with two main modifications:
1) All the edit history goes directly into the post, so you can see each edit and the progression. The goal here is transparency.
2) The reputation system (karma or votes) is either positive, neutral or negative, and each "vote" requires an accompanying comment as well. There should be able to view all the 'votes' with full transparency as to the voter and the voter's comment.
Leveraging something like PhpBB or Vbulletin or Reddit(open source) is 100% acceptable solution