TestCoin: A coin so easy to mine, it can teach anyone how to use mining software, while making them feel like they are getting tons of coins (like 100,000 coins released per block or something). Also meant to be given away freely, to get people interested in Coins.
Devcoin. Since it's merge-mined with BTC it takes no real effort to get, and you get several million per block.
CoinCoin: A Coin that should never be exchanged for USD. A coin meant to be used to get coins with.
The list on this one is pretty long, basically any coin from FTC forward.
JokeCoin: A Coin that is so hard to mine, that no one will want to do it.
Bitbar. With a generous payout of .00001 per block and 520, or 5200... 52000 confirmations to get paid, you can order a real bar of gold delivered across country by horse and receive it before any bitbar shows up in your wallet.
