1000 Blank Cards
This is a game played with pens and blank paper. Basically it works like any trading card game, except you go for points not kills, and players create cards as the game is played. Cards are allowed to destroy other cards, so it's hard to make yourself win by giving yourself a "hojillion" points on a card. Mostly it is about making funny cards.
dead link: http://geocities.com/nconner23/bwcards.html