Licensing .Net Pro - Software license management for .Net software and components. Provides software encryption and source code obsfucation. - http://www.licensingdotnet.com
MC# (MCSharp) - A high-level object oriented programming language based on .NET Platform created specially for developing complex industrial program systems that could use multiprocessor architectures. - http://u.pereslavl.ru/~vadim/MCSharp/
.NET Languages - List of .NET programming languages; resources. [DotNetPowered.com] - http://www.dotnetpowered.com/languages.aspx
Nemerle - A hybrid (functional, object-oriented and imperative) programming language for the .NET platform. It is statically typed, has metaprogramming capabilities and is specifically designed for programmers with C#/Java background. [Open source, BSD-like license - http://nemerle.org/