Bitperbit

Surely you've seen those icons that indicate something is loading. Web pages on your Mac, Windows, in order, are everywhere. If you are a Web developer, this is a good resource that you should not ignore. It is a generator of animated GIFs to help you create these icons, which are mostly used along with AJAX. You can select the type of image you want, and from there to bar icons, the background color and font color are also configurable to get the best results possible. This is an example:

Link | AjaxLoad
Via | Folksonomy