I think you can find it on Github, I found a C# one for Unity, I work mainly with Unity3D and in C#.
Here is some info on wrappers for other languages
"Yeah, the only caveat if you use a language other than C++ is that to use the Steamworks API you need to write a wrapper DLL
for it (in C++) so that the other language can communicate with it. But it's a relatively easy process and if you know another
programming language you should be able to do it quite easily with out needing to fully learn C++. Since it sounds like you are
writing software and not a game I'd also advise against using C++, C++ lacks good support for writing UIs whereas most other
languages come with libraries that make UI development MUCH quicker and easier."
Edited by Crichton333, 24 April 2014 - 11:17 PM.