Online Code Editors
codepen
CodePen
CodePen is a playground for the front end side of the web. It's all about inspiration, education, and sharing...
jsfiddle
JSFIDDLE
Test your JavaScript, CSS, HTML or CoffeeScript online with JSFiddle code editor...
sassmeister
SASSmeister
SassMeister is a playground for Sass, Compass, and LibSass. Add some Sass and SassMeister will show you the rendered CSS...
cssdeck
Css Deck
Collection of Awesome CSS and JS Creations to help out frontend developers and designers...
snipt
Snipt
Long-term memory for coders. Share and store code snippets...
jsbin
JS Bin
A live pastebin for HTML, CSS and JavaScript and a range of processors, including SCSS, CoffeeScript, Jade and more...