NovaChess

The Reverse Experience is a very special Reversi / Othello player. It includes a powerful game-search engine allowing for customization of the game's various play strategies. The game will select from different strategy scenarios to play against you, depending on the level you choose. So the game play itself will be different, with each level. By winning you can explore new strategies. Includes full docs.

The Reverse Experience - Reversi and Othello

Stackup is classic freeware Columns game

Play 3D Criss-Cross Game.