The Computer Language Benchmarks Game is a collection of 429 programs, consisting of 13 benchmark reimplemented across 33 programming languages. It is a fantastic resource if you are trying to compare programming languages quantitatively. Which, oddly, very few people seems to be interested in doing.
a critique of abelson and sussman. philip wadler.
the scheme resource site.
structure and interpretation of computer programs, second edition. the wizard book. harold abelson, gerald jay sussman, julie sussman.
the 90 minute scheme to c compiler. marc feeley.