jTree.JS is currently in development.
The idea behind jTree is to provide an easy to use, recursive tree, javascript framework.
This framework can be used to present and organize recursive structures for end-users.
For example, jTree could be used to present a filesystem with nested folders and files (google docs) or
nested groups that contain people.
jTree.JS is built on Backbone.JS, Underscore.JS, and Require.JS.