CryptoAlpaca - Adopt unique alpaca on blockchain and shear wools everyday
CryptoKitties - Breed and collect adorable creatures using Ethereum
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain
Crypto Corgis - Crypto corgis live (and die) on the blockchain
Loot - Loot is a bank account ledger.
Cryptocats - Cute little 8-bit cats on the Ethereum Blockchain