Tree

jsTree is jQuery plugin, that provides interactive trees. It 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. Other notable features are inline

Dynatree is a JavaScript dynamic tree view plugin for jQuery with support for persistence, keyboard, checkboxes, drag'n'drop, and lazy loading.   Dynatree - Features: Optimized for large dynamic trees (DOM elements are only created when really needed). Programmable through a rich object oriented interface. Support for lazy loading and Ajax. Checkboxes and hierarchical selection. Supports drag and drop. Support for persistence. Keyboard aware. Initializes from HTML code, JSON, or JavaSc

JqTree is a tree widget for jQuery.   JqTree - Features: Create a tree from JSON data Drag and drop Works on ie7+, firefox 3.6+, chrome and safari Written in Coffeescript