Check out https://opencollectors.network
We already have a proof-of-concept working, where you can create your own non-fungible collectibles :)
Disclaimer: Works with the Ropsten test network. We're currently in private sale, after which we're doing a full security audit for our contracts and deploying on mainnet.
RE: Fungible Assets vs Collectables - Part 1: The Theory of Crypto-Collectables