AJAX loader-GIFs at ajaxload.info
For all those web designers who do not want to use the same AJAX loader GIF over and over again or feel a bit uneasy about “borrowing” AJAX loader GIFs from other sites, ajaxload.info is literally the right address. Here, you find many different AJAX loader GIFs which can be created with user-defined foreground- and background colours, which makes them perfect for adapting them to your own design.
This is how it can look like in practice. Here with the MODx Doc Finder during the (hopefully short) waiting period for the search results: