Here are a few, in no particular order: Ur-Scheme: http://canonical.org/~kragen/sw/urscheme/ http://canonical.org/~kragen/sw/urscheme/ An Incremental Approach

Here are a few, in no particular order: Ur-Scheme: http://canonical.org/~kragen/sw/urscheme/ http://canonical.org/~kragen/sw/urscheme/ An Incremental Approach to Compiler Construction: http://scheme2006.cs.uchicago.edu/11-ghuloum.pdf http://scheme2006.cs.uchicago.edu/11-ghuloum.pdf PicoLisp: http://picolisp.com/5000/!wiki?home http://picolisp.com/5000/!wiki?home Lambda-the-Ultimate papers: http://library.readscheme.org/page1.html http://library.readscheme.org/page1.html SICP: http://mitpress.mit.edu/sicp/full-text/book/book.html http://mitpress.mit.edu/sicp/full-text/book/book.html LiSP: http://www.amazon.com/Lisp-Small-Pieces-Christian-Queinnec/dp/0521545668 http://www.amazon.com/Lisp-Small-Pieces-Christian-Queinnec/d... Maru: http://piumarta.com/software/maru/ http://piumarta.com/software/maru/ Edit: You might also enjoy Jonesforth (see jonesforth.S): http://git.annexia.org/?p=jonesforth.git;a=tree http://git.annexia.org/?p=jonesforth.git;a=tree