- http://regexr.com/ - RegExr: Learn, Build, & Test RegEx
- http://www.jsoneditoronline.org/ - JSON Viewer & Editor
- http://codepen.io/ - Front End Web Development on Browser
- https://ngrok.com/ - Secure tunnels to localhost
- http://requestb.in/ - Inspect HTTP Requests
- https://hyperdev.com/ - Online developer playground with NodeJS and online editor
- http://blog.klipse.tech/javascript/2016/06/20/blog-javascript.html - Embedding javascript code on webpages
- https://c9.io/ - Full Ubuntu workspace in cloud
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