Edwin is the MIT/GNU Scheme text editor.
Authors: (of Scheme) Guy Steele, Gerald R. Sussman Homepage: http://www.gnu.org/software/mit-scheme/documentation/mit-scheme-user/Edwin.html Family: EmacsFamily Platform: Windows, Mac OS/X, Linux, OpenBSD, Unix License: GPLv2
It's very similar to GNU Emacs, but uses Scheme as an extension language instead of Elisp.