Top 20 NuGet for Packages

Flee is Fast Lightweight Expression Evaluator.
.NET for Android (formerly Xamarin.Android) bindings for Google Play Services library 'com.google.android.gms:play-services-phenotype'.
.NET for Android (formerly Xamarin.Android) bindings for Google Play Services library 'com.google.firebase:firebase-auth-interop'.
.NET for Android (formerly Xamarin.Android) bindings for Google Play Services library 'com.google.firebase:firebase-perf'.
Xamarin.Android Binding Library for Braintree SDK - Paypal.OneTouch 3.15.0.1
Xamarin.Android Binding Library for Braintree SDK - Braintree.Droid 3.15.0.1
Command Line Parsing and Execution
Simple cross-platform plug-in that allows you to pick files and work with them. Version 2.1 supports .NET Standard and Visual Studio 2017 and 2019. Supported platforms are Xamarin.Android, Xamarin.iOS, Xamarin.Mac, Xamarin.Forms, UWP and WPF.
.NET for Android (formerly Xamarin.Android) bindings for Google Play Services library 'com.google.android.gms:play-services-ads-base'.
Thin F# API for AzureTackle for easy data access to AzureTackle database with functional seasoning on top.
Responsive Web Design on Any Browser, Any Platform, and Any Device
Xamarin.Android Binding Library for Braintree SDK - BrainTree.BrowserSwitch.Droid 1.1.3
Xamarin.Android Binding Library for Braintree SDK - BrainTree.Core 3.15.0.1
Xamarin.Android Binding Library for Braintree SDK - Paypal.DataCollector 3.15.0.1
File System API abstraction
Xceed Toolkit Plus for WPF is the commercial edition of the popular Toolkit for WPF project, the number one collection of WPF controls for creating next-gen Windows apps. You can try this package for free for 45 days, after which you will need to purchase a license key to continue using it.
Collection of MVVM Helpers such as ObservableRangeCollection, BaseViewModel, Grouping, and others.
.NET for Android (formerly Xamarin.Android) bindings for Google Play Services library 'com.google.firebase:firebase-appindexing'.
Xamarin.Android Binding Library for Braintree SDK - BraintreeDropIn.Droid 5.2.0
a visual scripting language aka Blueprint for C#.