SEO-Board is a fast, free and search engine friendly forum software written in PHP/MySQL. It is perfect for small and medium-size sites. If you are looking for a small, customizable and fast forum without all the bloat of the big ones, SEO-Board is for you.

Features of SEO-Board:
- Written in PHP and uses MySQL as a back-end. Requires: PHP 4.3.0 and MYSQL 3.23.23.
- No bloat. No fancy features. Just blazing speed.
- Does not take too many server resources.
- PHP and HTML are separated for ultra easy customization.
- Is flexible. Can fit into your site design.
- Anti-spam protection. Admin can ban IP/IP ranges/Users/Emails.
- Full moderator support.
- Message preview; locked and sticky topics; new topics highlight.
- Search Engine Friendly: comes with Apache mod_rewrite support; cookie-based sessions (no SessionIDs in the URLs)
- Multi-language pack support.
- Support for Private, Read-Only, Post-Only, Guest, HTML-Allowed, Topic Creation-Time Sorted Forums.
- Basic BBCode, Smilie, Signatures and Avatars support.
- Support for RSS/Atom feeds
- Forever 100% free for both personal and commercial use.