Material Bread is described as 'Material component library for React and React Native covering mobile, desktop platforms and the web' and is an app in the Development category. There are more than 50 alternatives to Material Bread for a variety of platforms, including Online / Web-based, Self-Hosted solutions, Mac, Windows and Linux. The best alternative is Bootstrap, which is both free and Open Source. Other great apps like Material Bread are Materialize (Free, Open Source), UIkit (Free, Open Source), Semantic UI (Free, Open Source) and Foundation (Free, Open Source).
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.