xmlisp - eXtreme Media Lisp: Rich media cross-platform programming for 3D (OpenGL) and 2D applications. I think I've mentioned this before, but I'm not sure. Doesn't matter, repetitions aren't unusual, and this is really interesting - a Lisp environment with particularly good support for 2D and 3D data. Has a lot more on the TODO list - the goal is a Lisp environment specifically for game programming and other graphical, interactive programs. A bit like Processing.