Heroku is known for its [Ruby](http://ruby-lang.org) hosting and later added [node.js support](http://blog.heroku.com/archives/2010/4/28/node_js_support_experimental/) as well. Now, [Heroku also supports Clojure](http://blog.heroku.com/archives/2011/7/5/clojure_on_heroku/):
> We’re very excited to announce official support for [Clojure](http://clojure.org), going into public beta as of today. Clojure is the third official language supported by Heroku, and is available on the [Cedar stack](http://devcenter.heroku.com/articles/cedar).
[Clojure](http://clojure.org) is a popular Lisp for the Java Virtual Machine. While Clojure applications could already be deployed on other Platform-as-as-Services (PaaS), such as [Google AppEngine](http://www.infoq.com/articles/deadline-clojure-appengine) — Heroku is the first Platform-as-a-Service provider to offer official Clojure support.