The ABR.s work fairly well in Gimp. Which is good for me since that all i have. “lol”
Just one bit of advice when using them in gimp. Don’t load a whole lot of brush sets in at once. it will take forever to load gimp, and in my experience it will crash randomly.
What i do is have a short cut to the brush folder in gimp on my desktop for easy brush switching. (just under the brush panel in Gimp there is a refresh button so you don’t have to close and open gimp when changing sets.)
I should add that i use Gimp 2.6 I updated it to 2.* but it was slow and buggy to me so i switched back ugg.