Material Design made easy in XAML and WPF with several control themes, new custom controls, and easy palette configuration.
Fully open source, free, and easy to implement. The library also seamlessly integrates with other popular open source WPF tools MahApps.Metro and Dragablz.
Demo projects are inluded in the source code, and the package can also be installed via nuget:
PM> Install-Package MaterialDesignThemes