I've been building a procedural world maker in Houdini recently. It is still a work in progress, but I think it's at a good place to show a little.
It's fun to see massive landscapes generate fairly quickly in Unreal Engine with this too.
__________
This can generate natural paths between chosen "settlement" locations and naturally flat areas. All sort of foliage, rock and decor scattering. It can also generate cliff-side meshes with different detail options. Plenty more in the works, as well.