Top 20 NuGet winrt Packages

Simplified Event Tracing for Windows (ETW) in Desktop apps and Windows/Windows Phone Store apps. Traces can be either structured or unstructured. For documentation see https://github.com/mmaitre314/TraceEtw .
Basic MVVM library for all purposes
A color picker control. Supports Windows and Windows Phone 8.1
Simple and light-weight logging framework for Windows Universal Application. It's compatible for Win app and WP8.1 app
A Menu control for Universal Apps, supports Windows Store & Windows Phone 8.1 apps
Extended ListView for Universal Apps. Added Pull to refresh functionality and "Load more data" when the listview reaches the end. Works on Windows & Windows Phone 8.1
System.Reflection cross platform package (plugin) to replace code usage in various projects like Xamarin.Auth
HolisticWare.Core cross platform package (plugin) with extensions and utilities for System namespace in Portable Class Libraries
Extension methods on MediaCapture and related classes. Supports Universal Store Apps for Windows Phone 8.1 and Windows 8.1. For documentation see https://github.com/mmaitre314/MediaCaptureExtensions .
SlideshowView (Carousel) control for Universal Apps. Creates a thumbnail/Dots view, Auto play slider. Works on Windows & Windows Phone 8.1
RadialMenu inspired from OneNote Windows 8 modern app. It allows you to show a nice circular contextual menu. Windows 8
SQLite Library Core
Extended Progress Ring is a radial progress control behaves like the progress bar (the progress is circular instead of linear), works on both Windows & Windows Phone 8.1
This Package contains a extensible Map Control for WinRT (Windows 8.1 / Windows 8.1 Phone) Supported Maps: - OpenStreetMap
Blendrocks UI Toolkit for Windows Phone 8.1
Model Validation for Universal Apps through delegate method invocation per-property or DataAnnotation styled attribute validation. Universal apps targeting Windows 8.1 and Windows Phone 8.1 lack built in, easy to use data Validation, so ValidatableBase was created.
Extension methods: DependencyObject.GetAncestors<T>() - finds all children of a specific type DependencyObject.GetParent<T>() - finds the first parent of a specific type Converters: CountToVisibilityConverter - converts the count of an enumerable property to Visibility DateTimeToDateTimeOffsetConv...
Camera preview in WPF Desktop apps using WinRT MediaCapture.
Simple and lightweight control for Windows Universal Application which allow to slide between one or two panels. It's compatible for Win app and WP8.1 app