GNU CLISP is an ANSI Common Lisp implementation
with an interpreter, compiler, debugger, object
system (CLOS, MOP), sockets, fast bignums, and
foreign language interface which runs on most
UNIXes and Win32.
License: GNU General Public License (GPL)
Changes:
GNU libffcall is no longer bundled with CLISP, so
you will have to install it separately. Many bugs
have been fixed.