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.
Node.js - Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications
TinyJPG - Compress JPEG images with perfect quality and file size
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.