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:
Just-in-time compilation of bytecodes (using GNU lightning), cross-compilation fixes, and many more features and bugfixes.