Ajax DHTML 3d Spinner Using GWT (Google Web Toolkit)
I have made a 3D spinner effect in flash before, but i really surprised when Dietrich Kappe the author of pathfinder agileajax announce the same effect in pure DHTML format.
The widget uses projection geometry (a view point and calculating image size and position based on where lines pass through the z=0 plane) and a little bit of trigonometry for the circle. Also, zIndex is set based on an object’s z coordinate. At this stage the implementation definitely performs differently based on machine horsepower and browser platform. It performs pretty well on IE7 and Safari 3, less well on Firefox.
This effect done using GWT (Google Web Toolkit) 1.5, look at the demo here. Dietrich still working on this library to add more functionality on this effect like drag and drop, response to clicks on images, the ability to spin arbitrary DOM elements, also to have CSS to control the style.
ajax auto suggest class with CSS, JSON, XML Support
ajax auto suggest class from brandspankingnew with customizable CSS to control the visualization, JSON, XML, Callback function, supported, able to add custom information, and custom message for no result returned.
The AutoSuggest class adds a popdown menu of suggested values to a text field. The user can either click directly on a suggestion to enter it into the field, or navigate the list using the up and down arrow keys, selecting a value using the tab key. The values for the suggestion list are to provided as XML (by a PHP script, or similar).
ajax powered shoppingcart system
justfutoncovers.com has a cool shopping cart system powered by ajax jquery, ajax calculation, scrolling thumbnails with inpage image replacement, thickbox for zoom function, jquery tooltips, etc. the next shoppingcart generation heh? i guess so 
(feat in Ajax Projects).
