Mozilla Labs : TogetherJSCollaboration made easy. Add real time collaboration features to your website today! Get Started TogetherJS is a free, open source JavaScript library by Mozilla that adds collaboration features and tools to your website. By adding TogetherJS to your site, your users can help each other out on a website in real time!
GitHub - jsfiddle/togetherjs: A service for your website that makes it surprisingly easy to collaborate in real-time.
