ddamok is a board game, that unite go(known as baduk) with omok(known as gomoku, piskvorky or wuziqi). ddamok runs cross-platform and you can do multiplay.
A crossplatform chess database which supports ChessGML, PGN, SVG, PostgreSQL and plugins written in Java or Jython. Some Python chess libraries and some Python tools are included.
Usable pieces are Java and Python opening classification libraries.