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

  2. Gijgo is a set of free open source javascript widgets distributed under MIT License.

  3. HTML5 Widgets & SPA Framework for Desktop and Mobile

  4. Unique toolkit for HTML5 Web development

  5. A CSS framework that actually looks good.

  6. Spectre is a web application to diff screenshots.

  7. Reactive Components for Modern Web Interfaces

  8. A React/Redux library for querying and managing network state

  9. Simple daemon for easy stats aggregation.

  10. (JavaScript Object Notation) is a lightweight data-interchange format

  11. Track, record, alert and visualize performance and availability of IT resources

  12. Graphite is a highly scalable real-time graphing system.