Top 20 NuGet XAML Packages

Geometries for WPF.
Tunes your UWP titlebar and statusbar.
Small lib for making use of WPF's grid less painful.
A really tiny class framework that helps binding ICommand objects from DataContext to class members in XAML in the form of invisible FrameworkElement objects. The view remains loosely-bound to the ViewModel in MVVM projects.
Make it easy to authenticate your app that uses the OneDrive SDK
Controls for media in WPF
Convenience attached properties for WPF's Grid.
Awesome highlighting add-on for WPF TextBlock
WPF for JavaScript
NB! This package is deprecated, use LiveXAML instead LiveXAML allows for live UI reload in Xamarin Forms applications. This package is a runtime dependency, you also need to install Visual Studio extension.
A flip view that works on Win7. Handles mouse & touch.
Linq operators on ObservableCollection