I know of Nano (XNO) but which I am not interested in. It has no fee.
I remember this coin and it's true that transaction fee of this coin is free. But what we can learn from here is people don't really look at the fees if it's about the longevity of the project. This is a good feature but you'd see that it has been one of the top coins before but now, it's ranked 314 based on its market cap.
but the part I found really interesting is Bitcoin unlimited which some of you might know were one of the architects of Bitcoin.
Is this a new project? Because IIRC, on 2018 there were a bunch of these projects, altcoins that we're named after Bitcoin. I thought that trend won't stop and we'd see names like bitcoin universe, etc. you get the point.
