I actually like newLisp - not exactly Common Lisp, but I find the implementation easy to follow. check it out on www.newlisp.org. Compiles just about anywhere

I actually like newLisp - not exactly Common Lisp, but I find the implementation easy to follow. check it out on www.newlisp.org. Compiles just about anywhere and comes with a nice testing framework so you can regression test your changes, etc.