Both GIMP and Krita are free, open-source alternatives to Photoshop in terms of painting and photomanipulation.
I mostly use Krita nowadays, but a decade before, I had dabbled on GIMP.
Around that time there was drama around GIMP's host, Sourceforge,
and I had trouble finding other free programs on PC until I found (Autodesk) Sketchbook and Krita.
I'm just wonder on how GIMP is doing now, so that I might dabble on it again?
And how does GIMP compare to Krita, and the other way around?