Vichan is the most popular and widely used imageboard software in the world. It is free, light-weight, fast, highly configurable and user-friendly imageboard software package. It is written in PHP and has few dependencies. It was forked from Tinyboard in 2012, and has continued development under a variety of different maintainers throughout its history.
Currently, Vichan is maintained by a Development Commission comprised of Development Commission lead by @basedgentoo, Yuri Kuznetsov, and @RealAngeleno.