CMUCL is the CMU implementation of Common Lisp. This is a 18a prerelease, probably the most stable version to get for FreeBSD. For further information see http://www.cons.org/cmucl/ First-aid documentation is in the manpages lisp(1) and cmucl(1) and via the normal Common Lisp documentation runtime functions (describe ...) (documentation ...) and (apropos ...). There is a real user manual that is currently adopted to 18a. See the homepage for pointers, we have GNU info, postscript and initial HTML files. CMUCL's strength in comparison with other Lisp systems (or dynamic languages in general) is its highly optimizing compiler. If you know how to write efficient Common Lisp code, you are free of unwanted memory allocation, type checks, indirections to objects. And CMUCL helps you to write efficient Common Lisp, it generates very informative warning messages about code constructs that prevent compilation to efficient code. Optional packages for graphical user interfaces and other Common Lisp applications and libraries (I.e. "Hemlock" Editor) are are on ftp://ftp2.cons.org/pub/languages/lisp/cmucl/binaries/ (FreeBSD-Binaries) and ftp://ftp2.cons.org/pub/languages/lisp/cmucl/ports/ (source) Martin Cracauer