Free-Forum-Software.org

http://www.phpbb.com

phpBB™ (“PHP Bulletin Board”) is the world's leading Open Source forum software. Distributed under the GNU General Public License, phpBB is free software, developed by volunteers from around the world. phpBB is used on over 2.4 million commercial, non-profit, social networking and community websites in over sixty languages.

Features

- Scalable Solution - The database server and web servers can reside on separate machines.

- Written in PHP which makes for a fast and efficient product

- Open Source Product

- Forum Topic Subscriptions

- Permission Based User Groups

- Global and Restricted Moderator Access

- Compliant with the Children's Online Privacy Protection Act (COPPA) of 1998