[overshard]

I don't wanna down a nice looking project, very well done on the interface but, another one? There are already like 7+ of these I don't really see the need to produce another one especially one that is HTML+CSS only when many of the others feature JavaScript and more.

What features do you provide that say, http://jsfiddle.net/, http://cssdesk.com/, http://dabblet.com/, http://rendera.heroku.com/, doesn't? (Just the first 4 items that came up in a Google search, the list could go on...)

[anant]

I think the key extra feature is that you can share what you're working on with someone else and have both people collaborate in real-time (i.e. changes on either end show up near-instantly on the other side). Supplemented by a voice channel, this could potentially be useful.

JSFiddle et. al. don't have this, but I'm sure there are others out there that do.

[camus]

plunker does have that : http://plnkr.co

[mnicole]

Because none of them are the right solution for every use case. http://cssdeck.com/ comes closest but OP's solution is much more simple and to-the-point.