Picnik is a free photo-editing tool that works in your browser. Compatible with photo-sharing sites Flickr and Picasa, among others, Picnik pulls your work from all the various sites (or from your computer) where you've stored it and gives you the tools you need to adjust exposure and contrast, retouch, apply effects, crop your photos, and more. Save and share? Yes, it does that too.
courtesy of netTrekker