I downloaded the trial version of photoshop elements and the trial of nikon capture, and I expect I'll buy one or the other. I also have the latest gimp for windows but as amazing as it sounds, it doesn't seem as easy to use as the others.
Not that I'm an expert, but with photoshop elements making some truly terrible shots look nice took maybe 60 seconds, so it's not too hard to use. $90 is more than "free", which is why I'm still trying them all out.
The only thing I don't like about photoshop elements so far is that just opening up the trial version brings my computer to it's knees, and I have an A64 3700 and 2 gig of memory... That's not encouraging. Of course, once it was open and I was actually using it to manipulate full size RAW (NEF) files, it was smooth so maybe it just sucks loading up at the beginning.