B.Y.O.V. International group, based in Wisconsin, US. Includes list of scheduled convention events.
Steve Jackson Games: Gamer and Store Finder Searchable database, with entries from all over the world. Contains information on games played (board games and roleplaying games, from SJG only). Registration available.
AccessDenied.Net Gamer Database Searchable database, with entries from all over the world. Covers computer PBEM, computer network, board games, roleplaying games.
