Gridlock is a collection of grid-based board games for GNUstep, including
Ataxx, Reversi, Gomoku, Connect Four, Breakthrough, Glass Bead, Hexapawn,
Quad Wrangle, Cats and Dogs and Moray Eels. You can play against another
person or computer opponents of varying difficulty, even over the network.

WWW: http://www.dozingcatsoftware.com/