Comment by sjsivak

The most important part of this post is the github repository: http://github.com/proletariatgames/HUGS

"This library includes Haxe externs for Unity and .NET frameworks, generated via the cslibgen utility. It also includes the HUGSWrapper "using" class, which includes various things to work around Haxe/C# translation issues, as well as make working with Unity easier."