Recs.
Updated
SpecsUpdate
Pros
Pro Easy editing in a tiled view
Tiled view that shows your image tiled in the editor, and permits you to edit it as you are seeing it tiled. If the brush passes out of your texture, it will just automatically wrap back the painting to the other side of the original texture, while permitting you to paint and see the results on any of the tiled "clones" (the shortcut key to activate this is w by default).
Pro Amazing support for displaying brushes
Krita's preset brushes are one of the default dockers. Each brush has a preview on mouseover that shows a detailed view of the type of brush involved. All the brushes also have useful and descriptive names such as "HP Pencil" or "Textured Fuzzy".
Pro Versatile
While Krita is mainly a program to do art, you could also do photo editing with no problem. The support for non-destructive editing and the inclusion of G'Mic plugins extends Krita from a painting software with simple photo editing to a professionally capable photo editing software.
Cons
Recommendations
Comments
Flagged Pros + Cons
Con Poor touch controls
They are still pretty much a WIP. But they are getting there.