Set in Block - Blockchain-based permanent message creator and reader
CryptoKitties - Breed and collect adorable creatures using Ethereum
CryptoAlpaca - Adopt unique alpaca on blockchain and shear wools everyday
Ethereum Gas Monitor - Ethereum Gas Monitor is a mac menu bar app that displays gas prices for fast, average and safe slow ethereum transactions.
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain
CryptoPunks - Unique characters you can own on the Ethereum blockchain