Design Principles - An open source repository of design principles and methods
UXmeter - Like Tinder, but for finding the hottest web design in town
UX Research Field Guide - Your map to the world of UX research 🌏🕵️♀️
Atlassian Design - Design, develop, and deliver
UX Design Weekly - The best user experience links each week to your inbox
Facebook Design - Resources for Designers from the Facebook Design team