ImageOptim - Faster web pages and apps.
Beyond Compare - Beyond Compare allows you to compare files and folders.
Node.js - Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.