CSSDesk is and online CSS sandbox. You can enter your html and css there. and view how it looks like.
You can share the icon and html with you user. You can also downlaod the result.
You also get some different background option.
Here is one of the share url of css desk share http://cssdesk.com/jLWnV
CSS Desk is nice tool for all the web developers to share there css and html with others.
Hope this tutorial will help all of you.