Clojurescript + Reagent or Om Because Clojure as a language really spoils you, it's more concise and quick for prototyping than any other tool I've tried. And

Clojurescript + Reagent or Om Because Clojure as a language really spoils you, it's more concise and quick for prototyping than any other tool I've tried. And Reagent or Om build lightning fast interfaces.