About Python and Skulpt:

Python is an easy to learn, powerful programming language... Python's elegant syntax and dynamic typing, together with its interpreted nature, make it an ideal language for scripting and rapid application development in many areas on most platforms. (from the Python Tutorial)

Skulpt is an entirely in-browser implementation of Python. No preprocessing, plugins, or server-side support required, just write Python and reload. You can find incredible resources, examples, and documentation on the Skulpt website.