Indodax (previously Bitcoin Indonesia, it changed its name on 14 March 2018) is an exchange based in Indonesia (which you might have guessed).
Indodax has close to 1.6 million registered users at the time of this review and it is quickly gaining popularity in the cryptocurrency community. It is particularly popular among Indonesians. This might be due to the fact that deposits of Indonesian Rupiah can be executed immediately. Withdrawals takes roughly one bank day. BTC-deposits and withdrawals, however, are both executed immediately.