lavdusk

"Whatever's on the radio"

PhotoGIMP should work if you want a more Photoshop-y feel, though it's not a plugin, it's config file changes
https://github.com/Diolinux/PhotoGIMP

@Custoslibera
I think Robin Walker would be a fantastic successor.
https://en.m.wikipedia.org/wiki/Robin_Walker_(game_designer)