Xamarin.AndroidX.Migration by: Microsoft

This package provides a set of tools and MSBuild tasks to aid in the migration from Android Support to Android X.

Xamarin.Build.Download by: Microsoft

Support for downloading and unpacking archives when building MSBuild projects

ZKWeb.System.Drawing by: ZKWeb.System.Drawing

This is a .Net Core compatible System.Drawing implementation modified from mono project, works on windows and linux. Please see project site for more information.