CryptoKitties - Breed and collect adorable creatures using Ethereum
ArtMajeur - +1 Million original artworks, Free Shipping Worldwide, Low prices guaranteed, 14 days return: buy all the art you love on Artmajeur!
OpenSea - Ebay for cryptogoods. Buy and sell items on the blockchain.
WikiArt - The Encyclopedia of Fine Art
Rarible - Create, sell, collect digital items secured with blockchain
Artboost - Artboost is an art marketplace.