IceBB is a powerful, fast, free, and open-source forum solution powered by the free PHP and MySQL. IceBB scales well, no matter how many users or posts, due to its clean and efficient code. It can also be fully customized to your needs with full skin and language support. A powerful admin control center, along with easy-to-use moderation tools, allow you to easily manage all aspects of your forum.
IceBB also comes with a great community, willing to help you with any problems you encounter, in English, French, Spanish, and many more languages. More Info »
Some of IceBB's features include:
Favorite topics and forums
Private messages in the style of a topic
Powerful admin control center
PHP-based skinning system
Full localization support (language system, full Unicode support)