Here are some free photo editing software check out.
GIMP - This software is aimed at technically-minded individual but also provides guidance to get one started. This can be regarded as more sophisticated tools by some, but easy enough for beginners. Software feature cloning, healing tools, correcting lens distortion and vignetting, and drawing tablets.
Picasa - Created by Google and provides a feature to search, edit and share photos online with their free hosting photo album hosting from Google. This tool can help with scratches, spots, red eye, and cropping the image.
Adobe Photoshop Express - Free online photo editing program from Adobe, and all it takes is enrollment. After doing so an individual can tweak and tune up the photo, touch ups and offers 2GB of storage.
Picnik - Photo editor is free features resizing, cropping, rotating, plus text effect that displays forms or overlays. Social networking site that uses this software include Flickr, MySpace, Webshots and Photobucket.