Color Quantizer!

Saving images for web/email/other media with the best compression ratio and quality is a difficult task if you don’t have the right tools. Choosing the right format then choosing the right parameters are the key factors of smaller files. Previewing the resulting image and the projected filesize will help the user choose the best settings. This kind of image optimization software is often called “Save for web”.

ImageAlpha is a GUI for pngnq and pngquant. It allows you to easily generate paletted PNG images with full alpha channel.

Ximagic Quantizer provides 10 quantization methods: Uniform Popularity Octree Median Xiaolin Wu v2 Dennis Lee v3 Binary Split Lloyd (K-Means) NeuQuant SColorQ