phpForumPro

phpForumPro is a fast and powerful, password protected private discussion
forum application built with the industry standard PHP scripting language
and powered by the MySQL database engine. Features include: unlimited
categories; topics and messages; user authentication; user rankings; message
ratings; file uploads; advanced permissions support; fast and powerful
search engine; powerful full-featured administration; forum moderator
support; lost password auto-email; 100% language independent; extendable
program code; easy installation with the help of user-friendly installation
wizard.