UpLabs - The best material design, iOS & web resources, every day
Componly - The design system OS
Eva Design System - A free customizable design system
Keep Design System - Create beautiful and consistence user interface with ease
Prokit - Curated UI Kits - Get a head start on your next project with editable designs
Frames X - Frames X is a design system plus eBook to streamline your design workflow and help save thousands of working hours. With Frames X you will design beautiful interfaces, create great design systems, and stay up to date with the best design practices.