ILISP is a powerful GNU Emacs interface to many dialects of Lisp,
including Lucid, Allegro, Harlequin LispWorks, GCL, KCL, AKCL, ECL, IBCL,
and CMUCL.  Also some Scheme implementations are supported as well as
a preliminary version of Xlisp/XlispStat.

You can find ilisp in ftp.icsi.berkeley.edu:/pub/software/elisp/.