One language that seldom gets mentioned is Postscript. People tend to think of it as just a page descriptor language, but really that is just the built-in graphic functions.

So we have a post fix (RPN, similar to HP calculators) expression style, which is really a mirror image of Lisp. You have genuine first class functions, introspection, and something I don't see that often is first class environments. That is you can, within any part of the code, activate an environment (they call it a dictionary, which is very similar to a C structure). And they stack, so that something not in the active environment can be automatically looked up in a parent environment.