Scheme

Scheme is a functional programming language of the Lisp family. Praised for its minimalist design, Scheme also pioneers the lexical scope, tail-call optimization and first class continuation.

Implementation

Guile

Guile is the GNU Ubiquitous Intelligent Language for Extensions, the official extension language for the GNU operating system.

Racket

Formerly known as PLT Scheme

Major Mode for editing Scheme

• Scheme-mode
• Geiser
• Quack

Minor Mode for editing Scheme

• Paredit is a mode for structured editing of S-expressions. Useful with any Lisp.
• [Rainbow_delimiters] highlights parentheses, brackets, and braces according to their depth, each level in a different colour. Also available in ELPA.

Useful Links

• Racket documentation on Emacs as IDE