Nitobi Tree adds a dynamic, hierarchical data view--similar to the folder view in Windows--to your web application with minimal coding and effort. The Ajax-driven tree component features drill-down, unbound mode, client-side statefulness, skinnability, and a data-driven sidebar. Nitobi Tree is available as part of the Complete UI suite of Ajax components, http://www.nitobi.com/pro ducts/completeui/