Scheme2Js is a Scheme to Javascript compiler distributed under the GPL license. While some effort has been spent on being as close as possible to R5rs, we concentrated mainly on efficiency. Usually Scheme2Js produces Javascript code, that is comparable to
This is a collection of various Emacs hacks, mostly useful enhancements for the released Emacs or stuff that's been rejected for the development version, by David Love.
An interesting tool for numerical computation and data analysis, based on OCaml. Its author, David McClain designed the Lisp-based Siglab system afterwards. Interfaces exist for C/C++, VBasic, OCaml, Dylan, Mathematica, Lisp, and Scheme.
Marc Feeley demonstrated how to write a simple Scheme to C compiler, in Scheme. In only 90 minutes! Presentation material (slides?), source code and video (200MB) are available.