WOOL

Window Object Oriented Language. A small Common Lisp-like extension language. It claims to be the fastest interpreted language in C with run-time types. Colas Nahaboo <colas@sophia.inria.fr>. Version 1 is used as the kernel language of the GWM window manager. Version 2 has an object system.

ftp://export.lcs.mit.edu/contrib/gwm.