CryptoKitties - Breed and collect adorable creatures using Ethereum
Programming Hub - The best app to learn 14+ programming languages such as Python, Assembly, HTML, VB.
MetaMask.io - A crypto wallet & gateway to blockchain apps
Vmaker - Video chat, without a chat!
CryptoFighters - Collect, train and battle with unique fighters with Ethereum
Mars Genesis - 10,000 unique parcels of Mars stored on the blockchain