ChainLink is a brand new, extremely promising ICO coming out very soon. I personally am extremely excited for ChainLink and I have invested into it. ChainLink is an ERC20 token. The supply of ChainLink is 1 billion and the hard cap is $32 million. There is a 20% bonus during the presale.
The best way to explain Chainlink is to think of it as the middle man in smart contracts. Smart contracts are a way to do trustless deals with Ethereum and ChainLink allows smart contracts to be used with off chain resources like data feeds or APIs. ChainLink supports Ethereum, Bitcoin, and Hyperledger.
Here is an image of ChainLink in action.
ChainLinks official site: https://smartcontract.com/link