2. Shapeshift.io
is this really a dex? i mean you send your coins to them to buy other altcoins. seems pretty much centralized to me .if their website gets shuts down they are gone. its just a service as far as i see it. its a good service and it always worked for me. but thats not a DEX.
see something as BITBOOST they cant ever be shut down and all transactions are private. thats a real dex and they will probably get very, very HUGE.