GIMP 2.10 is so good that I urge anyone still using the older versions to update.
And if you’re using GIMP (or Krita), then you absolutely must get G’MIC. Anyone manipulating images should have these tools available.
Fun with G’MIC filters in GIMP:
Free and open source software for the planetarium dome and other immersive environments.
I’m half-watching these and listening as I do other things, pausing to note differences from 2.79 that I know will trip me up.
From the official Blender YouTube channel
https://www.youtube.com/playlist?list=PLa1F2ddGya_-UvuAqHAksYnB0qL9yWDO6