While we are on the topic of image editors here is another one I like. Gimp is not for the faint hearted. It is a high power image editor and it will take some time to learn, but I think once you have learned how to properly use this you will love it.
Their site has this to say about their product.
GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages.