The project has moved to https://github.com/greenya/irrlichtlime
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The Irrlicht Lime is a .NET wrapper for the Irrlicht Engine. It wraps most of API available in native library, easily allowing you to use 2D/3D graphics in your app, written in C#, VB.NET or other .NET language.
Currently Lime is being develop under Visual Studio 2010 with .NET Framework 4.0. It includes bunch of examples and IntelliSense documentation.
Lime is not a distinct "engine", it is a wrapper...