Ethmojis are built on the ENS. It allows you to claim an emoji subdomain (such as 🔥.ethmojis.eth) which can be tied to an Ethereum address, host an IPFS site and much more. Each Ethmoji is unique and cannot be replicated. Once registered, the domain is fully under your control forever at no additional cost.
A good list of Emojis can be found here.