Shrink O'Matic - Shrink O'Matic is an AIR application to easily (batch) resize (shrink) images.
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
ImageOptim - Faster web pages and apps.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Optimage - Advanced image optimization tool
Mass Image Compressor - Mass Image Compressor is easy to use - a point and shoot batch image compressor and converter tool for Web site optimization, photographers, HTML game creator and casual Windows users.