Race for the Galaxy AI is a fanware of the Race for the Galaxy cardgame, and expansions designed by Thomas Lehmann. Keldon Jones is an excellent developer, and his artificial intelligence is super strong. The program has been updated numerous times for both UI and AI improvements. If you want to try this woderful card game with all three expansions, The Gathering Storm, Rebel vs Imperium, and The Brink of War, download and play Race for the Galaxy AI.
There is no tutorial, so these rules (PDF) should be handy: