ASTreeView is a FREE powerful treeview with drag drop, ajax loading, context menu, xml import/export, checkbox, selection, add/editing/deleting nodes with ajax, themes all in one tree! it is developed in asp.net as a custom control.
the astreeview uses ul/li(html element) to render the tree, that's why it's pretty fast! (unlike other trees which use xml as datasource and use javascript to parse the xml on the client side.)
of course you can use the .js file for other projects. please contact me if you need the .js source file.
demos are also included in demo project, please get it from SVN. check the source code to know how to use the astreeview control.
please feel free to drop me a line if you have any suggestion or requirement. you can reach me at: astreeview support email or my website.