Macchiato implements Ring in ClojureScript. Other than that, I don’t believe there’s any other implementation.

@weavejester As a fun experiment for the holidays, I’ve ported it to CFML (ColdFusion): https://github.com/seancorfield/ring-cfml

This is after I decided my port of FW/1 from CFML to Clojure (https://github.com/framework-one/fw1-clj) was not worth continuing since it wasn’t buying me much beyond Ring + Compojure + Component + Selmer (the four libraries it wrapped up) — despite it being one of the two most popular CFML frameworks (I originally created it back in 2009 for CFML and ported it to Clojure starting in 2011).