100 Free Spades
Spades is a free version of the popular card game where you have to reach 500 points, competing against three other players. All the cards are dealt, and in every round you show the highest card you have of the suit currently in play. Simple, right? The game lets you play against the computer, real players via a local network, or even on GameSpy servers. You'll find a short tutorial the first time you run the program along with a guide containing its simple rules.