Top 20 NuGet xamarin Packages

The Apache Commons CLI library provides an API for parsing command line options passed to programs. It's also able to print help messages detailing the options available for a command line tool.
The TeeChart for Xamarin.Android Charting components offer the most common chart types, gauges and maps with customizable tools for data visualisation in mobile applications.
Write your app using System.Net.Http, but drop this library in and it will go drastically faster. This is for Xamarin.Android only.
jsoup is a Java library for working with real-world HTML. It provides a very convenient API for extracting and manipulating data, using the best of DOM, CSS, and jquery-like methods.
Xamarin.Android Binding for Kotlin Common Standard Library (org.jetbrains.kotlin:kotlin-stdlib-common). Note: This is an "EmbeddedReferenceJar". It will not generate any Android Callable Wrappers (ACW) and C# API.
Xamarin.iOS Binding Library - Stripe
Lightweight Image Cropper for Android which also supports no-crop feature
Excalibur tries to bring structure for developers that are using MvvmCross and Xamarin to develop their mobile applications. This is provider that uses LiteDb as storage/database.
Excalibur tries to bring structure for developers that are using MvvmCross and Xamarin to develop their mobile applications. This is provider that uses file-storage as storage/database.
Simple wrapper library for Android ImageView. If you need an always square or rectangular Imageview, SquareImageView is for you.
LocationProvider is a tiny library that abstracts away a lot of the pain of getting a users location from the phone (without having to call location APIs), provides a fully configurable standard Builder pattern and a set of callbacks.
Here is the description
Xamarin iOS binding library of Texture - iOS framework built on top of UIKit that keeps even the most complex user interfaces smooth and responsive.
An easy to use drop-in framework providing user interface for taking pictures and videos and pick assets from Photo Library. User interface is designed to support inputView "keyboard - like" presentation for conversation user interfaces.
Client part of Elmish.Bridge for Fabulous
Custom navigation for Xamarin using Reactive Extensions
Blurs entire screen across Xamarin.iOS and Xamarin.Android
Xamarin.Android Binding for Qstumn's https://github.com/qstumn/RadarChart