• phpBB.com :: Creating Communities
  phpBB is a high powered, fully scalable, and highly customisable open-source bulletin board package. phpBB has a user-friendly interface, simply and straightforward administration panel, and helpful FAQ. It is based on the powerful PHP server language and a choice of MySQL, MS-SQL, PostgreSQL or Access/ODBC database servers which makes phpBB the ideal free community solution for all web sites.
  in phpBB with bulletin customisable fully highly open-source phpbb powered scalable by 39 users

scalable from all users