Top 20 NuGet universal Packages

MonoGame library for rendering meters like life and energy bars
The Swiss Army Knife for type conversion. Convert any type to another compatible type without worrying about which method to use.
A client library for interfacing with the SendGrid APIs, including the Event API. This is an updated and refactored version of the SendGrid package.
Several useful extension methods for the .Net Random class
2d camera for MonoGame
Client library for the Microsoft Speaker Recognition v1 APIs.
Class library for working with common data formats and files and mapping them to and from C# objects.
Handy Compression Serialization for WinRT. Part of Template 10, a Library of Helpers for UWP.
Hexagon.Universal.Commons is library which contains a lot of useful classes/helpers.
Google Analytics SDK for Windows and Windows Phone with support for Google Universal Analytics Measurement Protocol
Stimulsoft Reports.UWP is a reporting tool that is developed for Windows Universal App. Rich capabilities of rendering, viewing, printing and exporting reports – it's all about Stimulsoft Reports.UWP. The product uses the reports engine for creating reports which is based on the many years experienc...
Bonjour support for .NET 6, .NET Standard 2.0, .NET Framework, Xamarin, and UWP
Charting Controls for Windows 10, ported from the Silverlight Toolkit.
CrossPlatformLibrary.Settings is a plug-in for reading and writing of platform-independent application settings.
A set of controls, extensions and helper classes for Windows Runtime XAML applications.
This small framework will help you to build forms fast and easy in your UWP apps.
A bag-randomizer based on the TGM randomizer for doing sort-of random numbers
MonoGame library for making little flashcard games
Pre-built OpenCV 3.x binaries on Windows (UWP). This package contains native builds of OpenCV3 - C++ (x86, x64, arm). Note that VideoIO, and all dependent modules, require UWP Desktop extensions.
IconPacks for stylish awesome WPF and UWP applications.