GF1 (Gipf for one)
GF1 is a computer program for playing the 2 player boardgame GIPF.
The program has a nice and easy to use graphical user interface.
You can play against another human (but the real game is better for that), against the computer, or let the computer play against itself.
The computer player is good enough to beat even the best human players at the
moment (but it doesn't always win :-) ).