Design Principles - An open source repository of design principles and methods
Atlassian Design - Design, develop, and deliver
UXmeter - Like Tinder, but for finding the hottest web design in town
Facebook Design Resources - A collection of free resources made by designers at Facebook
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Gridbox - Create beautiful landing pages in seconds.