rosado's clj-processing - how to marry Processing and Clojure. With this, you should actually be able to rebuild the Processing GUI on the Mac so that Clojure is used instead of Java. Perhaps not entirely uninteresting to play around with.
Archive 17. October 2009
ScalaCL: Reap OpenCL’s benefits without learning its syntax (Scala DSL for transparently parallel computations) - and anyone who wants to play around with OpenCL will find what they're looking for here, without having to delve into the hardware depths.
Spde - and then there's also a combination of Scala and Processing. Also quite interesting to play around with.