HitBTC, BitStar and YoBit (source: btcgpu.org / Currently down).
Yobit is not a real exchange but a scam site. I suggest all not to use Yobit. You will lose money if you send larger amounts in, support will not awnser your tickets.
Just forget Yobit.Are you out of mind. There are many people involved Yobit to trade many types of altcoins. You can refer the below link when the bitcoin gold trading gonna start.
https://yobit.net/en/bitcoingold/timerThey do not consumer live chat to support them. Only they have ticket response system to send if you face any issues in trading or so on. You will get the reply according to your concerns.