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phpBB is flexible free forum software that enables you to create boards where registered users can post messages. Once you have a forum set up, you can make as many internal message boards as you want.

Along with some basic functionality, phpBB enables you to use extensions to add new functions to the forum. There are hundreds of free extensions you can use to add almost any forum-related feature you might want.

Its design is responsive-ready, allowing you to provide the best experience across devices.

Moreover, phpBB includes a theme system, which you can use to change your forum’s overall look. Users also get plenty of options for customizing their profiles and posts.

Finally, phpBB is open-source and benefits from having an active community.

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