Material Design, a visual language designed by Google to demonstrate good design and a unified experience across platforms and device sizes. Not just visual design, it includes meaningful and appropriate motion serving to focus attention and maintain continuity.
In the other hand, we have the popular Twitter Bootstrap Front End library that provides all the possible UI elements and Javascript components to create websites and web application. Here we have a great open source tool, the combination of Twitter Bootstrap and Material Design, called Material Kit.
With Material Kit, you will get the best thing of both Bootstrap and Material Design! Bootstrap elements and components are styled according to the style guide of Material design, it includes animation as well. Here are some of the examples: