CLISP is described as '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' and is an app in the development category. There are more than 10 alternatives to CLISP for a variety of platforms, including Mac, Windows, Linux, BSD and Self-Hosted apps. The best CLISP alternative is Hy, which is both free and Open Source. Other great apps like CLISP are mine IDE, MIT Scheme, Steel Bank Common Lisp and CMU Common Lisp.