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Chimere is a crypto swap and a non-custodian exchange that allows beginner/intermediate/advanced users to swap crypto-to-crypto easily, fast, and secure. Chimere welcomes and swaps your cryptocurrencies, dictated by the blockchain book before letting them navigate along the chain which restores them to his master.
FreiExchange was founded in 2016 in Norway by a team of local enthusiasts aiming to support Freicoin, an old crypto, that is also called “Bitcoin with demurrage”. The trading volume on this platform is rather moderate. As of now, it offers 31 cryptocurrency pairs with Bitcoin as a counter currency. 
bitfex.trade is a cryptocurrency exchange platform that unites significant market players. bitfex.trade supports cooperation with the most popular world cryptocurrencies and provides the possibility to gain profit at electronic money exchange transactions.