I've run out of programming languages to study (lambda-the-ultimate.org)

>> HTML, SQL, C, Java, Objective-C, Prolog, Common Lisp, CLOS, J, Scheme, Ocaml, Haskell, Agda, Oz, Reversible programming, Quantum algorithms to name a few.

You miss out the rising stars of programming languages: Erlang and Clojure.

Then just build something out of them.