EtherDelta is a decentralized Ethereum token exchange, brought to you by Etherboost.
Bitfinex is the world's largest and most advanced bitcoin trading platform
Negocie na maior empresa de moedas digitais do Brasil e da América Latina!
Luno makes it safe and easy to buy, store and learn about Bitcoin in Switzerland
Every single transaction is traceable and irretrievably stored in the blockchain.
Your coins and deposits are available and tradable 24 hours a day, 7 days a week.
The registration is free, depending on the provider there are different fees for the trade.