GtkAtlantic is a game like Monopoly(tm). GtkAtlantic is a network client that works with the monopd server.
gtkmonop is a GTK+ monopoly simulator. It uses the kmonop/monopd protocol, which is XML based.
Kapitalist is a Monopoly-like board game for 2-8 players. Walk around the board, buy properties, receive rent from your competitors, try to get monopolies to build houses and hotels on them and finally be the richest on the board.
Oligopoly is a Monopoly-like game in German.