[fierycatnet]

Try Clojure and ClojureScript, there a few people who went from Ruby to Clojure, it seems to attract Rubyist. "Clojure Programming" book is very good and compares Clojure to Ruby/Python a lot so it's easier to understand. David Nolan's talk about Om (React wrapper) is pretty awesome and shows the power of Clojure/CLScript. In fact Om is faster than React.js! You can write server and client side apps in Clojure and utilize JVM libraries. Plus it's a very small language but powerful, it's a LISP with no nonsense and production ready. Anyway, check it out. Clojure and Ruby are two of my favorite languages and I actually understand Ruby much better now after playing with Clojure.