Today, the term LISP usually refers to languages derived from LISP, the two most famous of those being Scheme and Common Lisp. Scheme programmers love the language so much, they almost make it sound like strong AI would have been achieved years ago, if only everyone programmed in Scheme. There's many Scheme implementations out there: Bigloo, Larceny, Chicken Scheme, Guile, Gambit Scheme, MIT/GNU Scheme, Chez Scheme, Scheme48, Hop and more.