Dabblet – http://dabblet.com/ is an interactive playground for quickly testing snippets of CSS and HTML code. It uses -prefix-free, so that you won’t have to add any prefixes in your CSS code. Dabblet is an interactive testing app for CSS — write some code and instantly see the results in the same window. The site works in most modern web browsers
Realtime Update, We can see the result at instant
Saving everything to Github Gists.
Inline previews for many kinds of CSS like colors, length, gradients, etc.
Automatically adds prefixes with -prefix-free
Multiple view modes