Krita may have started out as a digital painting tool, but today it is also a pretty good picture editing tool, and certainly easier to use than GIMP for many common photo editing tasks.

Regardless of that, not being able to select multiple layers at once (in GIMP) is downright inexcusable.

It's still the only open source image program I know that will not only let me print, but also show where the image will be on the page, and let me move it and scale it up/down. Seems like overkill, but I keep it installed for that reason.

As a KDE developer, I think Gimp is pretty great and has made massive progress in the upcoming 3.0 release (also on things only Krita could do so far, like reasonable colorspace-independence, also UI-wise). Obviously we're very proud of the Krita team. I use both regularly for different tasks, and that they have slightly different objectives and mission statements has been great for open source content authoring.