ReaViewer 2.0 (Windows)
Source: ReaSoft Development
ReaViewer is fast, flexible and compact image viewer. Additional features include slide shows, various format conversions (JPG, GIF, PNG, TIF, BMP ...) and photo enhancement tools. You can rotate, mirror, change height, width and color resolution of your image, change brightness, contrast, and gamma; change color balance of your image using filters, which operate in RGB, CMY, YCbCr, HLS, HSV color spaces, and create thumbnails.