Portable Standard Lisp
Portable Standard Lisp is a historic Lisp dialect that was developed at Stanford and the University of Utah from the late 1960s to the 1980s. Today it is primarily used as the implementation language of the REDUCE computer algebra system. The REDUCE source repository comes with several Portable Standard Lisp implementations for a variety of platforms (including transpilers to Java and JavaScript).

The Computer History Museum Software Preservation Group hosts a variety of documents relating to Portable Standard Lisp and its development: http://www.softwarepreservation.org/projects/LISP/standard_lisp_family/