Online Photo Editing
A few months ago I was looking for an online photo editing software that is free and easy to use, just something that I could create header graphics and website art with. A friend of mine here at Point2 told me about Aviary, and when I asked him how easy it was to use he replied, "Even you could figure it out..." That being said, I signed up for an account and surprisingly completed my first header graphic in about an hour using Aviary's Phoenix Image Editor.
This software is great if you have your own images that you'd like to spruce up and edit, or use for header graphics. Also, you can create images strictly with the tools that they provide. If you find yourself running into any difficulties, they have some pretty good tutorials, as well as FAQ's and help forums.
Give the Free version a try, who knows, maybe you'll create a masterpiece!