XenForo - Intuitive. Social. Engaging. Fast. XenForo brings a fresh outlook to forum software.
Simple Machines Forum - Simple Machines offers free open source software such as SMF, the powerful and easy to use community forum written in PHP. Start interesting discussions on your website!
MyBB - MyBB is a discussion board software that runs on PHP and MySQL
phpBB - Raspberry Pi. The Raspberry Pi is a cheap, credit-card sized computer. The official website uses phpBB for their discussion forums. phpBB is not affiliated with nor responsible for any of the sites listed on the showcase.
Flatboard - A Simple, Lightweight, Modern and Fast flat-file forum system written in PHP and Json.
NodeBB - NodeBB Forum Software - A better community platform for the modern web. NodeBB is a next generation forum software that's free and easy to use.