JavaScript - Lightweight, interpreted, object-oriented language with first-class functions
MIT Scheme - Implementation of Scheme providing an interpreter, compiler, source-code debugger, integrated Emacs-like editor, and a large run-time library
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
JSPython - Python-like syntax interpreter implemented with javascript that runs entirely in the web browser and/or in the NodeJS environment.
Gambit - Cross-platform chess game.
Pyjs - pyjs is a Rich Internet Application (RIA) Development Platform for both Web and Desktop.