Have you reviewed HEAT ledger?
Not really, only the knee jerk reaction below:
Probably one other non-Ethereum DEX, but TBH I am not that excited about it (my knee-jerk reaction from glancing over the project). The project is HEAT. Since more decentralized and trustless DEX implementations are being released and/or nearing release, I am becoming less and less impressed with DEX implementations that function via IOUs/gateways.
I apologize, but I am 39,000+ lines of code into my new project, and anything else is pretty much just a distraction. I have hardly been posting here.
As always, I am open to cooperation. If you want to post an overview/analysis of any DEX, then it would make it easier for me to add it to the OP.
Cheers.