Design Principles - An open source repository of design principles and methods
Really Good UX - A library of screenshots for UX inspiration
Facebook Design Resources - A collection of free resources made by designers at Facebook
Laws of UX - Key maxims that designers must consider when building UX
Facebook - Connect with friends, family and other people you know. Share photos and videos, send messages and get updates.
Owletter - Keep an Eye on Your Competitors' Newsletters