Clojure

Clojure ( clojure.org) is a Lisp dialect that is compiled into Java Virtual Machine (JVM) code.[The name Clojure is a pun on closure, a runtime object that combines a function and its environment (variable values), with a j for Java.] Since it runs on the JVM, Clojure connects to the Java ecosystem and has been used for serious web applications by large companies.

There is also a ClojureScript that rests on JavaScript.

Our Clojure system just handled its first Walmart black Friday and came out without a scratch.
- Anthony Marcar, Senior Architect, WalmartLabs