phpBB is used by millions of people on a daily basis, making it the most widely used opensource bulletin board system in the world. Whether you want to stay in touch with a small group of friends or are looking to set up a large multi-category board for a corporate website, phpBB has the features you need built in.
Newer users will appreciate phpBB’s extensive administration panel, which allows the customization of even the most intricate features without having to edit code directly, while advanced users will value the ease with which phpBB can be integrated into existing systems.
phpBB is released under the GNU/GPL license.