TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
ImageOptim - Faster web pages and apps.
Bynder - Bynder is a cloud-based solution for marketing professionals looking to simplify how they manage digital content via one central portal.
pngquant - command-line utility and library for lossy compression of PNG images
NetX - NetX is a digital asset management software.