Insane(ly slow but wicked good) PNG image optimization

A graphical tool to convert and optimize JPEG, PNG and WebP images (based on YOGA)

Batch image resizer, optimiser and profiler using ImageMagick convert, OptiPNG, JpegOptim and optional ZopfliPNG, Guetzli and MozJPEG.

asp.net core middleware to send compressed static files to the browser without having to compress on demand, also has support for sending more advanced image formats when the browser indicates that i has support for it.

Lossless PNG compressor - Use the zopfli compression algorithm，It works in python

Native Node.js module for zopflipng

Make PNG files as petite as possible

Snap for the pngpetite command line tool

parallel zopflipng gui

Zopfli Compression Algorithm is a compression library programmed in C to perform very good, but slow, deflate or zlib compression.