jDip is a tool for mapping, managing, and adjudicating Diplomacy games. It has a simple but powerful graphical interface, with a richly customizable map display. Windows, Linux, Mac OS X, and Solaris are supported. Over 25 variants are supported.
JavaChess DB (Java Chess DataBase) is a chess database tool.
You can work with database stored in pgn files or a new format, written in XML.
You can view the game list of the database,edit filters, view games and edit them.