1. A front end web development playground.

  2. Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.

  3. Multi language programming playground for developers.

  4. Sample of the bin:

  5. Liveweave is a HTML5, CSS3 & JavaScript playground for web designers and developers

  6. Collection of Awesome CSS and JS Creations to help out frontend developers and designers.

  7. dabblet is an interactive playground for quickly testing snippets of CSS and HTML code.