Steel Bank Common Lisp is a Scripts software developed by Christophe Rhodes. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Steel Bank Common Lisp:

MarydownEditor: Steel Bank Common Lisp (SBCL) is a high performance Common Lisp compiler. It is open source / free software, with a permissive license. In addition to the compiler and runtime system for ANSI Common Lisp, it provides an interactive environment including an a debugger, a statistical proFILEr, a code coverage tool, and many other extensions