Tetrisly - Starter kit for design systems and wireframes builder (Sketch/Figma)
Brand Colors - A color collection available in sass, less, stylus and css
Material Design Icons - 750 Free open-source glyphs by Google
Material Colors Native - Material colors native app for OS X
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design
Mediamodifier - Create beautiful designs and product mockups in seconds.