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 a variety of platforms, including Windows, Linux, Mac, BSD and Self-Hosted apps. The best LispWorks alternative is Hy, which is both free and Open Source. Other great apps like LispWorks are mine IDE, MIT Scheme, Steel Bank Common Lisp and CMU Common Lisp.
femtolisp is a simple, elegant Scheme dialect. It is a lisp-1 with lexical scope. The core is 12 builtin special forms and 33 builtin functions. It is fast, ranking among the fastest non-native-compiled Scheme implementations.
