Quack is a package that enhance Emacs support for Scheme. It supports many different interpreters such as Guile, Racket, etc. Geiser uses its own Quack version and, thus, makes Quack alone a good light alternative.
When you have installed it, you can add these lines to your .emacs file:
;; The binary of your interpreter (setq scheme-program-name "racket") ;; This hook lets you use your theme colours instead of quack's ones. (defun scheme-mode-quack-hook () (require 'quack) (setq quack-fontify-style 'emacs)) (add-hook 'scheme-mode-hook 'scheme-mode-quack-hook)