Libraries like Akka <http://akka.io/&#62 http://akka.io/> or the Celluloid stack <http://celluloid.io/&#62 http://celluloid.io/> are nice and bring the good par

Libraries like Akka <http://akka.io/&#62 http://akka.io/> or the Celluloid stack <http://celluloid.io/&#62 http://celluloid.io/> are nice and bring the good parts of OTP to more "friendlier" languages but you're still missing some fundamentals the Erlang VM which bring predictable performance such as distributed garbage collection.