This is another implementation of Clojure on the CLR (first one I believe is ClojureCLR[1]). There's also a long but interesting talk about this project from the author given at the Lisp NYC user group[2]. There are some cool examples showcasing interop with the Unity game engine.
[1] https://github.com/clojure/clojure-clr
[2] https://vimeo.com/203271192