jstree

jsTree is jquery plugin, that provides interactive trees. It is absolutely free, open-source and distributed under the MIT license. jsTree is easily extendable, themable and configurable, it supports HTML & JSON data sources and AJAX loading. jsTree functions properly in either box-model (content-box or border-box), can be loaded as an AMD module, and has a built in mobile theme for responsive design, that can easily be customized. It uses jQuery's event system, so binding callbacks on various events in the tree is familiar and easy. Themes can be autloaded too, but it is best for performance to include the CSS file. jsTree requires 1.9.0 or greater in your webpage. You can use a CDN version or include a local copy. Once the DOM is ready you can start creating jstree instances. jsTree uses events to notify you when something changes while users (or you) interact with the tree.