Comment on LispWorks

Commercial version adds ability to dump new standalone applications, not timeout after several hours of use, etc. The personal version is more than adequate for developing Lisp language software, differing mostly in matters of convenience from the commercial version. An upgraded version (Enterprise edition) adds capabilities such as an ORB, KnowledgeWorks (essentially, a Prolog development environment with certain expert system enhancements) and other tools. Cross-platform; free and commercial versions available for Linux and Windows as well as Mac.