FeatherBB is an open source forum application released under the GNU General Public Licence. It is free to download and use and will remain so. FeatherBB is a fork of FluxBB 1.5 designed to be simple and very lightweight, with modern features: MVC architecture, PDO, OOP (soon) and a plugin system (soon). Maybe more? You're more than welcome to join the development :-)

• A webserver
• PHP 4.4.0 or later
• A database such as MySQL 4.1.2 or later, PostgreSQL 7.0 or later, or SQLite 2

• Make use of a PHP accelerator such as APC or XCache
• Make sure PHP has the zlib module installed to allow FluxBB to gzip output

• Homepage: http://featherbb.org
• Documentation: soon
• Community: http://featherbb.org/forums/
• Chat: https://gitter.im/featherbb/featherbb
• Development: http://github.com/featherbb/featherbb