Top 20 NuGet class Packages

Virtlink's Collections Library
A PCL library that lets you connect Javascript on the browser side to the C# code by proxying C# side. For this library to be usable you need to use one of the platform packages.
libvideo is a fast, clean way to download YouTube videos. It is fully portable and has no dependencies. Find us on GitHub at https://github.com/jamesqo/libvideo
Full featured timer class for UWP.
Mapper for every class. Simple and free!
LibSVM Port in C# With Easy-to-use Models
The PDF File Writer II C# class library allows you to create PDF files directly from your .net application.
Lightweight class factory
This library parses class fields
A fast and customizable way to add type to your project. You can specify property types or can use conventions. Visit the Project site to learn about output and conventions' customization. Inspired by MVCScaffolding.
Command Line Parsing Library
System.Json cross platform package (plugin) to replace code usage in various projects like Xamarin.Auth
Caelan Framework for class building
ILogInject.Unity enables the Unity IOC container to inject a CommonLogging.ILog class logger into a registered class.
Demonstrates usage of the Xunit.Theoretical Test Cases base class.
Provides a foundation upon which Xunit Theory Class Data may be generated more succinctly.