Mono 1.1.13 has been ported to SkyOS. All mono assemblies for .NET 1.1 and .NET 2.0 have been ported as well. Porting Managed.Windows.Forms has begun and is almost finished. SkyOS's lead developer, Robert Szeleney, was responsible for this difficult port. He has written an account of that process. "Porting Mono was not an easy task at all."