Armed Bear Common Lisp
Armed Bear Common Lisp (ABCL) is an implementation of ANSI Common Lisp that runs in a Java virtual machine.
Commercial Common Lisp implementation by Digitool, Inc. A free demo version is available.
OpenMCL is an open-source Common Lisp implementation derived from Macintosh Common Lisp by Digitool. It runs under Linux PPC, Linux x86-64 and Darwin/MacOS X.