Available here (old snapshot): http://web.archive.org/web/20090503024239/http://www.koncon.nl/sono-bits/actkit.html
AC Toolkit
AC Toolkit is an open source Common Lisp application aimed at aiding music composition, ideas are based on AC Toolbox.
Available here (old snapshot): http://web.archive.org/web/20090503024239/http://www.koncon.nl/sono-bits/actkit.html