Top 20 NuGet XAML Packages

This package is only a redirect to the System.Waf.UnitTesting.Wpf package. System.Waf.UnitTesting.Wpf is the successor of this package.
A set of debugging controls and helpers for Windows Runtime XAML applications.
Fody plugin that converts automatic C# property into WPF DependencyProperty during build
Charting Controls for Windows 8.1, ported from the Silverlight Toolkit.
Controls library for Fayde.
Ready to use Windows Phone 8 barcode and QR code reader
Experimental Controls library for Fayde.
A set of debugging controls and helpers for Windows Runtime XAML applications.
A set of helpers, behaviors and extensions for building Windows Runtime XAML Business applications.
A library for localizing WPF. Allows switching languages at run time.
Loads and renders animated gifs on Windows 8.1 and Windows Phone 8.1 Appx
SnooDom converts Markdown into WindowsStore/WindowsPhone UI tree instead of HTML
A preprocessor hiding doc warnings from the autogenerated XamlTypeInfo class and hiding the class from intellisense.
Calendar control for Windows Phone 8.1 WinRT/XAML, ported from the Silverlight Toolkit.
Gauge control for Windows Phone 8.1.
A simple theme manager with optional UI user control for use in an WPF application.
XAML extension for localization (translation)
WPF MVVM Binding Package. Features: AutoWireVmDataContext, AutoWireViewConrols. How to use: https://github.com/Wallsmedia/MvvmBindingPack/wiki/MvvmBindingPack-v-3.0
A collection of useful tools for developing Windows and Windows Phone Apps using C# and XAML. This is a Portable Class Library that targets Windows 8.1 and Windows Phone 8.1. If you need Windows 10 UWP compatibility, try "VToolkit UWP" instead of "VToolkit".
Animation Manager is designed to animate xaml controls in a very very easy way. These animations work the same way on both Windows 8 as well as Windows Phone 8.