OpenLedger is a decentralized exchange which offers two options to trade CROAT:
CROAT/BTC (trade against Bitcoin): https://openledger.io/market/OPEN.CROAT_OPEN.BTC
CROAT/ETH (trade against Ethereum): https://openledger.io/market/OPEN.CROAT_OPEN.ETH
Soon we will also offer you a guide on how to use this exchange to trade Croat.