Perceptual JPEG encoder
Improved JPEG encoder.
jpegoptim - utility to optimize/compress JPEG files
Research JPEG encoder
A JPEG encoder in a single C++ file
A super simple Mac GUI for Google's JPEG encoder, guetzli
LibJpeg.Net allows you to read and create JPEG images in .NET compatible...
Guetzli perceptual JPEG encoder for Go (Zero Dependencies).
Demo from Chrome Dev Summit of using Web Assembly to optimize images in ...
Guetzli for NodeJS/Browser