Cards...or indeed any XAML content can easily be flipped using the new Flipper control and MaterialDesignCardFlipper style. 

XAML Standard is a specification that defines a standard XAML vocabulary. With that vocabulary, frameworks that support XAML Standard can share common XAML-based UI definitions. The goal is for the first version, XAML Standard 1.0, to be available later this year. 

WpfDesigner is a set of Assemblies which can be included in your Project to implement a XAML GUI Editor. 

Optimizing your XAML app for performance (10 by 10)

Windows 10 development for absolute beginners