Welcome to William Paul Vrotney's VLS!
The Vanilla Lisp Shell (VLS) is designed to provide an Emacs interface to a Lisp process that from the user's perspective works basically the same way for every flavor of Lisp. For example M-RET evaluates an expression and C-c C-b produces a back-trace regardless of the type of Lisp. VLS will work with any Lisp specification such as Common Lisp or Scheme and any Lisp implementation such as Allegro Common Lisp or CMU Common Lisp.
VLS 1.2 is available online at http://www.interhack.net/projects/vls/vls-1.2.tgz.
Documentation for VLS 1.2 is available online in HTML and PDF formats.