Angular Material!

Polymer is a library that uses the latest web technologies to let you create custom HTML elements. Build anything from a button to a complete application as an encapsulated, reusable element that works across desktop and mobile.

Materialize is a modern responsive CSS framework based on Material Design by Google

An implementation of Material Design components in vanilla CSS, JS, and HTML.

Material Components for the web (MDC-Web) help developers execute Material Design. Developed by a core team of engineers and UX designers at Google, these components enable a reliable development workflow to build beautiful and functional web projects.

Google's material design UI components built with React.