I know it's been asked several times, and there are work arounds, I would like to request it again, as it is a VERY helpfull/usefull feature. I to am a GIMP user, and recently I've become annoyed with GIMP, and its developers. So I'm trying to find another free alternative.
note: I've been using for 1 day. Sorry if I didn't dig deep enough in the menus for any of these features.
The main things I'm missing in PDN that GIMP has is:
grow selection
shrink selection
feather selection (smooth the edges & make its edges gradient to invisible over a set amount of pixels.)
sharpen selection (remove all feather/AA from the selection, making it solid and jaged)