Top 20 NuGet xamarin Packages

A lightweight PCL framework that helps you develop MVVM Xamarin.Forms applications easily.
Supported Platforms - iOS 10+ - Android - Universal Windows Platform (Win10/UWP) - Portable Class Libraries (Profile 259)
Declare your Yoga layouts in XML or JSON.
A simple way to connect your app to a PHP Server.
Use Azure NotificationHub in your Xamarin Forms projects
Use a branded Google SignIn button in your Xamarin iOS and Android apps
An client RPC library (abstract + XML RPC implementation) for .Net.
Xamarin Forms wrapper for android and iOS Intercom SDKs
Account manager for Xamarin and UWP. Store account information in your app in a secure way.
Xamarin.Android Bindings for Cuneyt Ayyildiz' Android Onboarder, a simple and lightweight library to create beautiful introduction screens for your Android apps.
The iOS front end for CSharpMath.
Xamarin.Android binding Library - Mapbox Navigation
FFmpeg binding for Xamarin Android
Xamarin forms controls for a custom button, toggle button, radio group and nine patch.