ImageOptim - Faster web pages and apps.
ImageAlpha - ImageAlpha is a GUI for pngnq and pngquant.
FILEminimizer Pictures - FILEminimizer Pictures compresses JPEG photos, TIFF, BMP and PNG images and pictures by up to 98%.
AdvanceCOMP - Play MAME on your TV Arcade Monitor or Fixed Frequency Monitor
Shrink O'Matic - Shrink O'Matic is an AIR application to easily (batch) resize (shrink) images.
PNGGauntlet - -Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs