ImageOptim - Faster web pages and apps.
Sketch - Professional digital design for Mac.
Node.js - Node.js is a platform built on Chrome's JavaScript runtime for easily building fast, scalable network applications
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Ruby on Rails - Ruby on Rails is an open source full-stack web application framework for the Ruby programming...
Affinity Designer - Professional creative software, exclusively for Mac.