gtermix is a gtk+ telnet client intended for calling BBSes. It utilizes a custom VGA textmode emulating terminal widget that allows it to accurately render bulletin board systems as they were in DOS terminal programs.
MercuryBoard is a bulletin board script written in Object-Oriented PHP. It utilizes a mySQL database, with support for more database programs in the near future. MercuryBoard aims to be the fastest, least server intensive, fully featured bulletin board.