CodePen - A front end web development playground.
Pastebin.com - Pastebin.com is a website where you can store text for a certain period of time.
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Pastelink.net - Anonymously publish text with hyperlinks enabled.
Liveweave - Liveweave is a HTML5, CSS3 & JavaScript playground for web designers and developers
PrivateBin - PrivateBin is a minimalist, open source online pastebin where the server has zero knowledge of...