Lisp from Nothing and Lisp System Implementation from [1]. There are quite a few open source Lisp implementations in addition to SBCL that you can peruse [2] (

Lisp from Nothing and Lisp System Implementation from [1]. There are quite a few open source Lisp implementations in addition to SBCL that you can peruse [2] (follow links to CL's supported by Quicklisp). If you are targeting a specific platform (JVM or embedded), then ABCL/ECL; see Clasp for using LLVM. To reuse modules for writing your own lisp, see SICL [3] [1] http://t3x.org http://t3x.org [2] https://www.quicklisp.org/beta/ https://www.quicklisp.org/beta/ [3] https://github.com/robert-strandh/SICL https://github.com/robert-strandh/SICL