ChessDB - ChessDB - a free Chess database for Mac OS X, Windows, Linux, and UNIX - like ChessBase, but better
FooBillard - FooBillard is a free and open-source, OpenGL-based billiards simulation game.
Lichess - The complete chess experience, play and compete in tournaments with friends others around the world.
Virtual Pool - A pool game so realistic, it improves your real game!
DecodeChess - AI chess tutor and analysis
ShootersPool - The realistic billiards game for the most demanding pool, snooker and carom players.