1)   Photo Toolkit 1.7
Photo Toolkit is a powerful freeware program to improve your digital photos. You can correct colors and remove red eye from a number of photos simultaneously, retouch portraits, add lighting effects, straighten and resize photos and more.

 2)   Mobile Photo Enhancer 1.3
Mobile Photo Enhancer provides a quick and easy way to improve the quality of your camera phone photos. It reduces Jpeg compression artifacts and digital noise, corrects poor color and sharpness and fixes the dark corners problem.

 3)   Photo! Editor 1.0
Get powerful and easy-to-use image editing tools for free with Photo! Editor. The program provides a number of useful image editing options without embarrassing you with a complicated interface.

 4)   Jpeg Enhancer 1.8
An advanced application that lets you remove JPEG artifacts and blotchy look from JPEG images, making them look as if saved with a 100% (super-fine) quality. Based on advanced science-intensive technology, it is a must-have graphics tool for all.