Unfortunately this wonderful piece of software is only in German.

Image Processing with JPG-Illuminator
JPG-Illuminator started as specialist for adjusting lightening and white balance of images. The program uses sophisticated methods, thus achieving high-quality results. The results do not differ significantly from exposure adjustments directly to the camera. JPG-Illuminator also covers all other basic image editing functions.
Whether you want to move just pictures, cropping, sharpening and tone: JPG Illuminator offers a solution.

And the best part: It does not take an expert to use these functions, and can still get professional results. All the tips and practical examples of the detailed manual complete the program.

As it is a tool for the average user it works only on jpg and bmp-files.

website : http://www.jpg-illuminator.de/galerie/index.htm