I've been using this forum for a short while and through out this period I've learnt a hell of a lot. So i thought id give something little back.
There is a free online based tool i've been using for a while to edit images, create product covers, create logos and banners quickly and effectively. You don't have to install anything because its all online, you can import and export images in popular formats though. It has quite a lot of slightly more advanced features too, which is impressive for a web based application. Best of all its all completely free.
Here is the link
Photo editor online / free image editing direct in your browser - Pixlr.com
Hope you find this as useful as I did.