A Set Of CSS Loaders/Spinners – SpinKit
The loading indicators that are mostly used in Ajaxed interfaces are shifting from images to HTML-elements for max. flexibility.
SpinKit is a free pack of these loaders that are built with HTML and CSS.
There are currently 8 of them, all are good-looking and, although their CSS styles are presented in a link, the HTML structure can be found in the source.