SovietCoin - All your coins go to the government
BitcoinCoin - Coins lose 50% of their value every week
TheismCoin - Balences are controlled by a central deity or deitites
AtheismCoin - Balences are controlled by the laws of physics
EinstienCoin - All balences are relative
I1Coin - Actually lasts more than a week
LiquidCoin - 33 minute blocks and pump-and-dump optimizing difficulty adjustment
FredCoin - 90% of coins are premined
3DCoin - Cool 3D graphics of each coin
noiCtiB - Doesn't compile
ForkCoin - Each node sets its own rules. Blockchain forks are encouraged.