Design Principles - An open source repository of design principles and methods
Porsche Design Book One - The ultimate notebook experience from Porsche
Facebook Design Resources - A collection of free resources made by designers at Facebook
Upcase by thoughtbot - An online learning platform for developers - now free
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Hot Right Now: Volume 2. - Discover the latest key web design trends of 2019