I just made one
https://code.google.com/p/boneimp/
It works, but you need to use GLImp and OpenTK, but you should be able to pull away from that if you want easily.
Edit: I forewarn, it is based off of some C runtimes I found, and I plan on swapping over to the official runtimes when they come out, but I will continue GLImp support.