CLiki is a wiki site providing a wide range of information about Common Lisp and Free Software Common Lisp projects. CLiki contains an up-to-date list of free/libre/open-source software Common Lisp implementations.
Dan Weinreb's Common Lisp implementation survey includes a lot of detailed information (recent as of Feb. 2010) about the different implementations.
Below is a list of Common Lisp implementation from commercial vendors:
Commercial Vendors
- Allegro Common Lisp from Franz, Inc.
- Platforms: Mac OS X, Microsoft Windows XP/Server/Vista/7, Solaris, AIX, FreeBSD, Linux
- LispWorks
- Platforms: Mac OS X, Microsoft Windows XP/Server/Vista/7, FreeBSD, Solaris, HP-UX, Linux
- Scieneer Pty Ltd
- Unix
Free/Libre/Open-Source Software Common Lisp Implementations
The canonical list of FLOSS Common Lisp implementations is kept on CLiki.