OptiPNG - OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without...
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
JPEG Resampler - Jpeg Resampler, nástroj pro konverzi a změnu velikosti obrázků, snadné použití, zdarma
Ralpha Image Resizer - High-speed image batch conversion tool
pngquant - command-line utility and library for lossy compression of PNG images
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.