1. Online Interpreters in JavaScript. Online coding and REPL. Run and share code.

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

  3. A front end web development playground.

  4. Pastebin.com is a website where you can store text for a certain period of time.

  5. Plunker is an online community for creating, collaborating on and sharing your web development ideas.

  6. Sample of the bin:

  7. Gist is a simple way to share snippets and pastes with others.

  8. HTML/CSS/JS and Markdown Code Playground For Web Designers and Developers

  9. Ghostbin is an open source paste service.

  10. Compileonline is now renamed to Coding Ground

  11. Pad editor for source code.

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