E-mage - From developers to developers: a cross-platform tool for losslessly image compression.
JPEG Resampler - Jpeg Resampler, nástroj pro konverzi a změnu velikosti obrázků, snadné použití, zdarma
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
ImageOptim - Faster web pages and apps.
JPEGmini - JPEGmini - The Photo Optimization Tool Trusted by Tens of Thousands Image Perfectionists
pngcrush - Pngcrush is an optimizer for PNG (Portable Network Graphics) files.