Auto-Complete TextField Example: shows a textfield with auto complete drop down like google suggest
Drop Down Choice Example: demonstrates the linked select boxes usecase
Clock Example: demonstrates a self-updating component via AjaxSelfUpdatingTimerBehavior
Editable Label Example: shows a label that can be edited inline via ajax
Effects Example: shows how to link wicket component updates with jQuery UI effects
Form Example: shows ajax form processing
Guest book Example: shows how a simple commenting system can be turned into ajax extravaganza.
LazyLoading Example: demonstrates lazy loading of components.
Links Example: demonstrates ajax enabled links
File Upload Example: demonstrates trasnparent ajax handling of a multipart form
Modal window: javascript modal window example
On Change Ajax Updater Example: demonstrates updating page with ajax when text field value is changed
Pageables Example: shows ajax paging
Ratings example: shows a rating component.
Tabbed Panel Example: demonstrates ajax enabled tabbed panel
Todo list Example: shows ajax todo list page without writing any JavaScript
World Clock Example: demonstrates a single component with AjaxTimerBehavior updating multiple components