Xamarin.Essentials by: Microsoft

Xamarin.Essentials: a kit of essential API's for your apps

Xamarin.Facebook.ShareKit.iOS by: Microsoft

C# binding for Facebook ShareKit's official SDK

Xamarin.Firebase.iOS.Analytics by: Microsoft

C# bindings for Firebase APIs Analytics iOS Library

Xamarin.Firebase.iOS.InstanceID by: Microsoft

C# bindings for Firebase APIs Instance ID iOS Library

Xamarin.Firebase.iOS.Storage by: Microsoft

C# bindings for Firebase APIs Storage iOS Library

Xamarin.Google.iOS.SignIn by: Xamarin Inc.

C# bindings for Google APIs Sign In iOS Library

xunit by: jnewkirk, bradwilson

xUnit.net is a developer testing framework, built to support Test Driven Development, with a design goal of extreme simplicity and alignment with framework features. Installing this package installs xunit.core, xunit.assert, and xunit.analyzers.

xunit.core by: jnewkirk, bradwilson

Includes the libraries for writing unit tests with xUnit.net.