Zhen over at ThemeFortress compiled a list of seven different plugins you can use alongside the bbPress plugin. Each of the seven plugins all offer you a variety of different functions, from a post toolbar to quotes. bbPress 2.0 was released back in September, so it’s cool to see plugins just for it popping up since then.
Here is one more for you:
http://bbpress.org/forums/topic/new-support-forums-plugin
This turns your bbPress install into a more advanced support forum. What bbPress Plugin needs is an advanced Search form Plugin.