ImageOptim - Faster web pages and apps.
Vallen jpegger - Vallen JPegger is the international, handy, and full featured image viewer, which shouldn't be...
OptiPNG - OptiPNG is a command-line PNG optimizer that recompresses image files to a smaller size, without...
Cloudimage - Cloudimage.io is the easiest way to resize, store, and deliver your images to your customers through a rocket fast CDN.
TruePNG - Command-line PNG optimizer.
pngquant - command-line utility and library for lossy compression of PNG images