I really like them as well. I enjoy them as a digital art form.
From what I understand, Scott Turner (Here Dragons Abound) got his inspiration from Martin O'Leary[0]. Lots of interesting reading on his site.
Another one in current development but as far as I know doesn't have a devlog quite like Scott Turner's is Azgaar's Fantasy Map Generator[1]. He did keep a devlog until 2018 sometime though[2].
Watabou's Medieval Fantasy Map Generator[3] is really good.
I'm sure I've seen more over the years but these are the ones I can remember.
Any others people really like?
-[0]: https://heredragonsabound.blogspot.com/