What are some alternatives?
When comparing JPEGmini and CodeKit, you can also consider the following products
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
ImageOptim - Faster web pages and apps.
Transmit - Transmit is an FTP client for Mac OS X and Mac OS Classic (which is unsupported).
pngquant - command-line utility and library for lossy compression of PNG images
Django - The Web framework for perfectionists with deadlines
PNGGauntlet - -Combines PNGOUT, OptiPNG, and DeflOpt to create the smallest PNGs