http://www.vbulletin.com
vBulletin is open source community building free forum software built with security, stability, and speed in mind.
E-Blah is a Perl-based forum system requiring very low system requirements making it a fast and flexible forum system. E-Blah is a forum constantly evolving, with new releases several times throughout the year.
Whether the audience is large, small, or in-between the E-Blah Forum Software is here to help it grow. Also, with thier virtually twenty four-seven technical support team, whom are ready to answer any question you may have about the system, you cannot go wrong.
- Scalable Solution - The database server and web servers can reside on separate machines.