L4 is a Forth interpreter written in Common Lisp. The aim is to implement a useful subset of the ANS Forth programming language, but some work is still needed.

L4 currently passes all tests in John Hayes' test suite and is able to execute Sokoban and Tetris games.

Source code: http://www.common-lisp.net/~heller/l4-0.1.tar.gz

License: ???