Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Design Principles - An open source repository of design principles and methods
Facebook Design - Resources for Designers from the Facebook Design team
UX Research Field Guide - Your map to the world of UX research 🌏🕵️♀️
InVision Studio - The world’s most powerful screen design tool
UX Design Weekly - The best user experience links each week to your inbox