Etherdelta(fork Delta) is aan exchange that provide a platform on which erc20 and all other ethereum based token. It was launched by Zachary Coburn.
The exchange is most adopted by user because of their low fees. For one thing, it doesn't charge on maker and for another, it charges 0.0001 eth for withdrawal.
The exchange although being a DEX and should have a measure of security, was hacked in 2017 and this is not encouraging at all. It is scary to trade on this exchange because history may repeat itself.
Another bad spot is that the like other decentralized exchange, etherdelta is slow in confirming order.