ZString by: Cysharp

Zero allocation StringBuilder for .NET Core and Unity.

ZXing.Net by: Michael Jahn

ZXing.Net is a port of ZXing, an open-source, multi-format 1D/2D barcode image processing library originally implemented in Java. It has been ported by hand with a lot of optimizations and improvements. It is compatible with .Net 2.0/3.5/4.x/5.x/6.x/7.x/8.x/9.x, Windows RT Class Library and Components, UWP, .Net Standard 1.x and 2.0x, .Net Core App 3.x, Silverlight 4, Silverlight 5, Windows Phone 7.x and Windows Phone 8.x and Xamarin.Android

ZXing.Net.Bindings.ZKWeb.System.Drawing by: Michael Jahn

ZXing.Net Bindings for ZKWeb.System.Drawing - use ZKWeb.System.Drawing with ZXing.Net for barcode reading