YaBB for Mac

From Xnull:

YaBB (Yet Another Bulletin Board) is a free bulletin board and instant messaging system written in Perl. It can be used on any type of site: personal, non-profit, commercial.... Web-based bulletin board systems are one of the best ways for visitors to communicate with each other and with members of the company or website developers. With the continuous development of YaBB, we try to provide as many features as we can, so that we can compete with all the major competitors - even those that charge for their system. We take suggestions FROM the YaBB Community and fix bugs reported by the YaBB Community. Therefore, this is a system by the users for the users.