Recently, I stumbled across the free UI Kit called Material Kit from the guys over at Creative Tim. I have always liked working with the Bootstrap framework and Material Design has also become pretty popular online.
I took the HTML/CSS files and turned in it a free WordPress theme called MaterialKitWP. If you are looking for a WordPress theme with Material Design elements based off the Bootstrap framework then I think you will really enjoy MaterialKitWP. You can download the theme over at MVPWP.com as use it on your next project.
Keep an eye out for the premium version that will include even more functionality, page layouts, and features.