Zoner Photo Studio Free is an image manipulation application which can manage, edit and create photos within a beautiful interface while providing a number of helpful and comprehensive tutorials. It is a freeware image editing application that's user friendly, attractive, well-designed, comprehensive and light on system resources.
Here is a screenshot to illustrate the features and user interface of this application:
Praat
Able Fax Tif View
Neat Image
DeepSkyStacker
AKVIS Enhancer