Liquid War is a truly original multiplayer wargame.
Lucky Dice is a dice game. Marbles is very similiar to Atomix and was heavily inspired by it. Merchant Empires is a multiplayer, Web-based game of space exploration and economic competition. Moon-buggy is a simple character graphics game, where you drive some kind of car across the moon's surface. NetHack is a Rogue-like adventure game supporting character and X displays.