Gimp is really not great for photo editing IMO - it really shines at photo manipulation. (i.e. it is Photoshop, not Lightroom.) For RAW development (a la Light

Gimp is really not great for photo editing IMO - it really shines at photo manipulation. (i.e. it is Photoshop, not Lightroom.) For RAW development (a la Lightroom), DarkTable and RawTherapee exist. I've only tried the former, and found it incredibly difficult to use. I also prefer Krita for digital illustration (though maybe that's unfair - it's best at digital painting specifically.) Of course, if you need vector support, Inkscape is the obvious answer.