Piio - Generates responsive images so you don't have to optimize
Optimage - Advanced image optimization tool
imgix - Real-time Image Processing. Resize, crop, and process images on the fly, simply by changing their URLs.
tiny.pictures - Real-time image-processing, optimization, and Content Delivery Network
EOS Fitness - EOS Fitness is a dynamic platform that provides the best solution for peoples’ mental and physical health.
Pixelhunter.io - Free AI image resizing tool for social media