Looks like five new sets added since last time I visited that site a few years ago. Thanks for the reminder! Should get back to using a RSS reader to not miss updates from sites like that.

Last time I tried it seemed to work quite well to import the Photoshop-brushes into Krita. I do not remember if it had built-in support for that or if there were extra steps, but a quick search shows there are several tutorials available on how to do it anyway. On the other hand the terrain images extracted from those maps are quite useful also as just images to copy-paste without setting up fancy brushes.