U.R.G.E is a project mainly written in C#, it's free.
U.R.G.E. Universal Rapid Gamma Emitter (twitter edition)
Feel free to create Issues to tell me about bugs / new features.
Right now U.R.G.E works on any windows that has .Net 4.0 installed you can get it here
http://pastebin.com/DGsgHFLQ