XOTcl
Website: media.wu-wien.ac.at
Designed by: Gustaf Neumann and Uwe Zdun
XOTcl is an object-oriented extension for the Tool Command Language created by Gustaf Neumann and Uwe Zdun.
It is a derivative of MIT OTcl.
XOTcl is based on a dynamic object system with metaclasses which as influenced by CLOS.
Class and method definitions are completely dynamic.
XOTcl provides language support for design patterns via filters and decorator mixins.