JSitor - Test your NodeJS, JavaScript, CSS, HTML online with JSitor code editor.
MIT License - A license from the Massachusetts Institute of Technology.
CodePen - A front end web development playground.
Simplified BSD License - Also known as the "2-clause" BSD license, this is a simplified version of an open source license created at the University of California Berkley.
JS Bin - Sample of the bin:
AGPL - GNU Affero General Public License. Strong license for applications designed to guarentee user freedoms to access, modify, and redistribute server-side code.