Top 20 NuGet android Packages

Free Open source Xamarin Forms Controls Library targeting Profile 111, iOS, Android and UWP. Card View, Expansion Panel
Invention for Android.
Simple MonoGame library for a rectangle that uses float values instead of int
Non-standard Extensions (utilities) to Xamarin-Auth (refresh-token)
Provides useful functions for Watch Face application development of Android Wear with Xamarin.
Guillotine menu animation
P2PNET is a low level portable peer to peer library written in C# with an emphasises on being simple to use
Simple cross-platform plug-in that allows you to pick files from the filesystem (iCloud drive in case of iOS) and work with them.
With this package you can create files, write files and load text from file.
Xamarin Bindings library for Alerter - https://github.com/Tapadoo/Alerter
Most of Codon's functionality is located in this shared code base, which is a .NET Standard library. Features that require platform specific implementation are implemented in respective platform specific packages. In the case of this package, the platform specific packages are: Codon.Android, Codon....
This package consists of a .NET Standard library that provides undo/redo support. Codon is a zero-dependency cross-platform MVVM framework for creating UWP, WPF, and Xamarin applications. It provides much of what you need to rapidly create sophisticated yet maintainable applications.
Create vector based font icons for TabbedPages and Labels. Using vector based font icons removes the need to scale images. FontAwesome, IonIcons, FoundationIcons, and Themify Icon keys included.
Simple cross-platform plug-in that allows you to pick files from the filesystem (iCloud drive in case of iOS) and work with them. Version 2.0 now supports .NET Standard and Visual Studio 2017.
Toasts.Forms.Plugin assemblies from net45 folder
Provides a sample implementation of a StackPanel that shows how to add tags in multiple rows.
Display HUD's dialog.
Share resx file to Xamarin.Android and Xamarin.iOS projects.
Xamarin Android Binding Library. SpinnerWheel is a iOS like picker.