Tic Tac Toe A-GoGo for Mac

From Jonathan Holley:

Tic Tac Toe A-GoGo is a simple application that pits you against the computer in a game of Tic Tac Toe. Tic Tac Toe A-GoGo has a complete set of strategies, meaning that the computer player can play as well as the best human player. There is a setting to disable some of the computer strategies, making it a weaker player. Tic Tac Toe A-GoGo's most interesting feature is that there is a setting that enables the computer player to cheat. At random intervals, the computer might play two moves, decrease your score, or increase its own. This feature can be disabled, but it is more fun to play with it left on.