ZoneBB is a free bulletin board software written in Php and MySQL. ZoneBB will include many modern message forum features as it is developed. New features will also be added as well as more permissions for the administrator. ZoneBB has three main focuses which are SECURITY, FREEDOM and CUSTOMIZATION for both downloaders and developers!!!
ZoneBB is currently looking for more developers, theme/graphic designers, support staff and promotion guides. If you are interested, see this link.