Paint.net is a free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools. An active and growing online community provides friendly help, tutorials, and plugins.
I've not used it as much as GIMP...but I think I'm going to start REALLY using it. I know a lot of people like it better than GIMP....I need to break my habits of use and give it a shot. It seems really powerful for what little time I've put into it. I thought I'd share this with you in case you've never heard of it and are looking for a photo editing program.
Download it at: http://www.getpaint.net/