phpBB is one of the most widely used free discussion board scripts. This free and very powerful application is easy to install and administer. It allows flexibility in terms of design and organization.
phpBB is a free flat-forum bulletin board software solution that can be used to stay in touch with a group of people or can power your entire website. You can create a very unique forum in minutes using the extensive database of user-created modifications and styles database containing hundreds of style and image packages.
phpBB is open source, licensed under Version 2 of the GNU GPL. True to its name, phpBB was written in the PHP programming language. phpBB 3.1 has the added benefit of being built upon the Symfony framework.
The objective of this article is to provide you with an understanding of installation and configuration of phpBB.
Full article here:
Creating and Setting Up Your Own Forum Using phpBB (Unixmen)