What is the present list of DAG based ledgers? I could find tangle/iota, byteball and this. I'd like to research more into this, so any additional references would be helpful.
I'm pretty sure there is only Byteball and Iota at the moment, well, and this project. Which is really interesting, because if this was anything like traditional blockchain projects, you'd have approximately a billion clones by now, including IotaClassic, ByteballClassic, Bitball, My and so on.