Steel Bank Common Lisp is described as '(SBCL) is a high performance Common Lisp compiler. It is open source / free software, with a permissive license' and is a Programming Language in the Development category. There are more than 10 alternatives to Steel Bank Common Lisp 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 Steel Bank Common Lisp are Armed Bear Common Lisp (Free, Open Source), CMU Common Lisp (Free, Open Source), CLISP (Free, Open Source) and ManKai Common Lisp (Free, Open Source).
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.
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.
MIT/GNU Scheme is an implementation of the Scheme programming language, providing an interpreter, compiler, source-code debugger, integrated Emacs-like editor, and a large runtime library. It's best suited to programming large applications with a rapid development cycle.