Whimsical Wireframes - Lightning fast wireframing with real-time collaboration.
Tetrisly - Starter kit for design systems and wireframes builder (Sketch/Figma)
Invision - Prototyping and collaboration for design teams
Material Design Icons - 750 Free open-source glyphs by Google
Figma Map Maker - Figma plugin to generate map, supporting Google Maps, Mapbox
Material UI - A CSS Framework and a Set of React Components that Implement Google's Material Design