XmlMenus allows you to create both horizontal and vertical menus that are Xml based.

Here's how it works. Place an Xml control in your WebForm(.aspx) at the location you want the menu to appear. Then set the Xml control DocumentSource and TransformSource properties to point to the Xml and Xsl files for that menu. Finally, include the menu.css and the menu.js files in your web page. Your done, you've just added Xml Menus to your site.

Instructions are included with the demo and in the download.