Gentoo Linux is an open source operating system built on top of the Linux kernel and based on the Portage package management system.
Boasting almost 14 million posts, Ars Technica is one of the biggest and oldest technical forums still operating today. They use phpBB to power their forums and comment system.
Active community for UK based Audi TT owners. Almost 30k members and 2 million posts, complete with unique style & powered by phpBB.
Discussion forum for the massively popular American animated sitcom. Powered by phpBB.
12 Chat Forums is one of the largest and most active social and chat communities in the Arabic language. Their community boasts nearly 2 million posts and 80,000 users.
A very active community for a KFAN-AM, a popular sports radio station in Minneapolis/St. Paul, MN.