Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Ralpha Image Resizer - High-speed image batch conversion tool
Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.