CLISP

CLISP is the most popular implementation of Common Lisp. It is straightforward to download and install it on Windows. When executed directly, it displays the ASCII logo of CLISP, enters a Read-Eval-Print Loop (REPL) and offers a prompt to the user. Like in any interpreter (Python for example), the user can type Common Lisp code directly at the prompt and see it being executed.

Alternatively, the user can create a .lisp file with Common Lisp code (hello.lisp for example) and execute it with CLISP by calling clisp hello.lisp at a command prompt. This assumes that the clisp.exe executable is in the PATH.

Tried with: CLISP 2.49 on Windows 7