LispWorks is described as 'commercial implementation and IDE for the Common Lisp programming language' and is a IDE in the development category. There are more than 10 alternatives to LispWorks for Windows, Linux, Mac, BSD and Self-Hosted solutions. The best alternative is Hy, which is both free and Open Source. Other great apps like LispWorks are Steel Bank Common Lisp, CMU Common Lisp, Armed Bear Common Lisp and CLISP.
LispWorks is mainly a Programming Language but alternatives to it may also be IDEs. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of LispWorks.
CLISP is a portable ANSI Common Lisp implementation and development environment by Bruno Haible. Interpreter, compiler, debugger, CLOS, MOP, FFI, Unicode, sockets, CLX. UI in English, German, French, Spanish, Dutch, Russian, and Danish.
Allegro CL is the most powerful dynamic object-oriented development system available today, and is especially suited to enterprise-wide, complex application development. Complex applications with billions of objects are now made easy with Allegro CL 9.0.