Allegro CL
Franz Allegro is a CL compiler available for Linux, Unix, and Windows. Free versions are available.
CMU Common Lisp: CMUCL
CL implementation, runs on most major Unix platforms, mainly conforms to ANSI CL standard; fast compiler outputs native code, of near C speed; powerful module system, data structur…
Corman Technologies
Corman Lisp and PowerLisp compilers with support for 68k and PPC Macs. [Shareware/Freeware for personal use]
ECL: Embeddable Common Lisp
ANSI CL, has interpreter, Lisp to C compiler, can make standalone executables or libraries to call from C programs. [Open source, LGPL]
GNU Common Lisp: GCL
CL interpreter. Home site: description, mail list, archives, news, CVS, downloads, links. [Open Source, GPL]
LispWorks Ltd.
Was Xanalys. Integrated cross-platform development tool, full native ANSI Common Lisp implementation for Linux, Mac OS X, Unix, Windows; related products, services. [free and comme…
Lush: Lisp Universal SHell
Object-oriented language for researchers, experimenters, engineers, for large-scale numerics and graphics. Merges 3 languages: (1) weakly-typed, garbage-collected, dynamically scop…
OpenLisp by Eligis
ISLisp interpreter, coded in C, ported to over 90 architectures, 16- to 64-bits. [commercial, free non-commercial use]
SBCL: Steel Bank Common Lisp
Compiler and runtime system for ANSI CL. Has interactive environment including an integrated native compiler, debugger, many extensions; runs on many platforms. [Open Source, GPL]
Star Sapphire Common Lisp
DOS CL implementation with CLOS. Download, full CL reference manual. From Sapiens Software Corp. [free copyrighted unsupported shareware]
Ufasoft Lisp
Common Lisp development system. Includes command-line and IDE interpreters. Possibility of creating EXE-files. [Free non-commercial and education use]