Based on a layout built with the YAML CSS Framework
Message Box CSS found on Janko at Warpspeed
Spinner Control for Prototype by Ken Snyder
Ajax Loading GIF Animation from ajaxload.info
The USCII-5x7-ENGLISH-C0 specification was generated using a single script in the REBOL language. If you want to look at how clean the specification and the code that manipulates it is, take a look at the source on GitHub.
Though the primary implementation of REBOL is proprietary, I do think it is a very interesting spin on "modern LISP"—and I have written several articles about it.