JPEG Resampler - Jpeg Resampler, nástroj pro konverzi a změnu velikosti obrázků, snadné použití, zdarma
TruePNG - Command-line PNG optimizer.
ImageOptim - Faster web pages and apps.
OptiPNG - OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without...
pngquant - command-line utility and library for lossy compression of PNG images
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!