CryptoKitties - Breed and collect adorable creatures using Ethereum
CryptoAlpaca - Adopt unique alpaca on blockchain and shear wools everyday
Neko Atsume: Kitty Collector - Adorable Japanese cat-collecting game. Meow!
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain
CryptoTwittos - Own Twitter accounts, on the blockchain
MetaMask.io - A crypto wallet & gateway to blockchain apps