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Bit-Z is a Hong Kong-based cryptocurrency exchange that was launched towards the end of 2016. It is one of the top ten crypto exchanges around the world in terms of the reported trading volume.
Oasis App is an open-source DeFi product developed by the Maker Foundation. An original OasisDEX project was closed in January, 2019. With the help of Oasis App, you can trade and borrow Ethereum tokens. 
Coinall is a Malta-registered exchange and a strategic partner of OKEx. The exchange offers multiple pairs for trading, including stablecoins and quality tokens.