Icon (which came from SNOBOL) is one of the few programming languages I consider to embody truly new ideas. (Lisp, Forth, and Prolog are others that come to mind.)

Icon is an amazing language and I wish it was better known.

You probably know this but, for anyone else who is interested, the easiest way to get a feel for Icon nowadays may be through its descendant Unicon which is available at unicon.org.