Garlicoin is fast and cheap.

It's a litecoin clone, so it's useful for testing btc, ltc, doge, without needing testnet -- Real coins, better tests

There's a faucet available -- Get some grlc to play with at https://garlicoin.org/faucet/

Give p2shdata a test drive (free). Save data/files to the garlicoin blockchain -- create p2shdata