ImageOptim - Faster web pages and apps.
ImageAlpha - ImageAlpha is a GUI for pngnq and pngquant.
jStrip - jStrip is a free tool to reduce the file size of JPEG images without sacrificing image quality.
PNGGauntlet - -Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs
AdvanceCOMP - Play MAME on your TV Arcade Monitor or Fixed Frequency Monitor
Ximagic Quantizer - Ximagic Quantizer Toolbox with 10 color reduction filters (uniform, popularity, octree, median, wu, dennis lee, binary split, neuquant and scolorq) and 11 dithering filters error diffusion:(floyd-steinberg, fan, jarvis, stucki, sierra3, sierra2, sie…