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IDEX is a cryptocurrency exchange that was launched early last year. The exchange aims to offer users the experience of a centralized exchange that boasts the security benefits of a decentralized platform. The exchange provides a peer-to-peer trading environment. It also uses smart contracts to relay transactions over the Ethereum blockchain, and this allows the order book of your account to be updated in real-time.
Zebpay is a centralized cryptocurrency exchange established in 2014. With its help, one can buy/sell 6 crypto coins for euro as well as trade with 5 crypto-to-crypto pairs. 
Vertex.Market is a peer-to-peer cryptocurrency marketplace created by a team of crypto enthusiasts trying to solve one of the biggest hurdles in the crypto world, cashing out (and in) your funds.