Spectacle V0 (previously Startup-Videos) - Showcasing the best startup videos
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Bloc.io - Learn to code and become a web developer in Ruby on Rails, HTML, CSS, Javascript, and jQuery in Bloc's Intense Online Web Development Apprenticeship.
Sketch - Professional digital design for Mac.
Sandwich Video - Great videos about great products.
Affinity Designer - Professional creative software, exclusively for Mac.