Top 20 NuGet uwp Packages

Action Message Format for Windows Runtime is the reader and writer of AMF0 and AMF3.
A very rich implementation for ICommand pattern with 24 types of commands that meet all the requirements.
Monolith4 is a Windows UWP library that lets you create animations in codebehind in a fluent, somewhat straightforward manner. It's a wrapper around the Windows.UI.Xaml.Media.Animation library that removes as much of the setup as possible.
UWP Base Helper
LCARSToolkit.Controls is a package of LCARS-like controls for Windows Universal
Joystick UserControl for UWP apps
Allows you to create and delete files and directories in a PCL or in an Android or UWP project
Gracefully Coding. For Universal Windows Platform.
Cake Addin for creating UWP packages.
The Microsoft Xbox Live Service API (XSAPI) enables game developers to access Xbox Live. To get access to the Xbox Live service, you can join the Xbox Live Creators Program at https://aka.ms/xblcp, or apply to the ID@Xbox program at http://www.xbox.com/en-us/Developers/id
GridExtra is a custom panel library for WPF/UWP.
CCUWPToolkit for UWP
thread safe File Utils for UWP
Toolkit containing useful controls and services for UWP applications.
SQLite3 intergrated with wxSQLite3 encryption part for UWP. You can use a C# wrapper (SQLitePCLRaw etc.) to call the output sqlite3.dll.
A uwp controls library.
For C# UWP Apps, Windows 10 SDK for Google Analytics implementing the Google Universal Analytics Measurement Protocol
Utility library making it possible to do more with XAML in UWP apps.