CryptoKitties - Breed and collect adorable creatures using Ethereum
CryptoAlpaca - Adopt unique alpaca on blockchain and shear wools everyday
CryptoTwittos - Own Twitter accounts, on the blockchain
Crypto Corgis - Crypto corgis live (and die) on the blockchain
CryptoPunks - Unique characters you can own on the Ethereum blockchain
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain