5 surprising reasons I use Krita for photo editing on Linux: 
Krita is best known as a digital painting application, but in my experience, it’s kind of a digital imaging powerhouse. Recently, a fork of GIMP called GLIMPSE had to pause its development, and because I like alternatives, it occurred to me that Krita could be a reasonable photo editor for at least some use cases. It isn’t easy to measure the suitability of an application for a group of tasks because different people require or prefer different things. What’s very common and indispensable to one person is an edge case for someone else.
read more: Opensource.com sethkenlon
Supporting Open Source.
Have you tried: Farking?