Tetrisly - Starter kit for design systems and wireframes builder (Sketch/Figma)
React Rainbow Components - Build your web application in a snap.
Material Design Icons - 750 Free open-source glyphs by Google
Figma Autoname - Name all your Figma layers in one click.
Figma Design System - Starter kit for your UI design projects in Figma
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design