CodePen - A front end web development playground.
Snippet Store - A snippet management app for developers
JSFiddle - Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor.
Snipper.ml - A simple snippet manager in the menubar
Liveweave - Liveweave is a HTML5, CSS3 & JavaScript playground for web designers and developers
Paste App - PASTE is software for storing and sharing text. The software was originally forked from the outrageously popular pastebin. com before the domain was sold in 2010. Read more about PASTE.