Design Principles - An open source repository of design principles and methods
Laws of UX - Key maxims that designers must consider when building UX
Colorbox.io - Create accessible color systems 🎨
Lottie by Airbnb - Easily add high-quality animation to any native app
Product Disrupt - A design student's list of resources to learn Product Design
Digital Behavioral Design - Human behavior is programmable. A book on product design.