Xamarin.Build.Download by: Microsoft

Support for downloading and unpacking archives when building MSBuild projects

Xamarin.Android.Support.Vector.Drawable by: Xamarin Inc.

Vector Drawable Android Support Library C# bindings for Xamarin

YamlDotNet by: Antoine Aubry

A .NET library for YAML. YamlDotNet provides low level parsing and emitting of YAML as well as a high level object model similar to XmlDocument.

XLParser by: TU Delft Spreadsheet Lab Infotron

A parser for Excel formulas

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.