SLIME extends Emacs with new support for interactive programming in Common Lisp. The features are centred around `slime-mode', an Emacs minor-mode that complements the standard `lisp-mode'. While `lisp-mode' supports editing Lisp source files, `slime-mode' adds support for interacting with a running Common Lisp process for compilation, debugging, documentation lookup, and so on.

WWW: http://common-lisp.net/project/slime/
