Embeds Scheme in Common Lisp.

A small and portable implementation based on a bytecode interpreter designed to be used as a testbed for experiments in implementation techniques.

Jonathan A. Rees's unofficial page: history, links, status.

HTMLized by Margaret Fleck, one of the authors of Envision.

A list of Scheme implementations from the Scheme FAQ maintained by Mark Kantrowitz.

DEC's venerable translator, runs on most anything with an ANSI C compiler.

An implementation of the Scheme language in OCaml. The primary purpose of Schoca is the use as an embedded extension language in OCaml applications. [Open source, GPL]

The FAQ for Scsh, the Scheme Shell.

Very small, portable implementation, has some database, Unix programming, CGI scripting extensions. Runs on DOS, Linux, Unix, Windows. Free source downloads.

Portable Scheme implementation, conforms to IEEE/ANSI standard, supports all features of R5RS Report, many features of Chez Scheme and various SRFIs. Derived from XScheme: object system dropped, many changes, additions.