CryptoKitties - Breed and collect adorable creatures using Ethereum
Crypto Corgis - Crypto corgis live (and die) on the blockchain
Cryptopurr - Facebook for cryptokitties built on Ethereum
Cheeze Wizards - A blockchain battle royale from the CryptoKitties team
CryptoKittydex - A tool to help CryptoKitty geneticists decode the genome
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain