If you need to build a community forum, try phpBB. First released in 2000, phpBB is a bulletin board solution that allows you to create forums and subforums. phpBB supports the notion of users and groups, file attachments, full-text search, notifications and more. Hundreds of modifications are available including themes, communications add-ons, spam management and more.
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phpBB is an easy to use, easy to manage Bulletin Board App that gives developers yet another Powerful Tool to use. Keep up the good work Bitnami !!!
I've used several packages, but I continually come back to phpbb. It's not the best, it's just one of the easiest to customize. It needs work, but it is simple to reconfigure for your own purposes.