Best open-source javascript tree?

javascript ajax tree ajaxcontroltoolkit widget

jsTree seems best.

Open source: MIT license
Features: lazy loading, context-menu, keyboard navigation, drag & drop, inline editing, customizable, CDN hosted.
Stackoverflow has 1,551 questions taggedwith jsTree
Alexa page rank of jstree.com is better than others

Other close contenders:

Fancytree (upgraded version of Dynatree)
zTree

javascript ajax tree ajaxcontroltoolkit widget

I use this one:

http://bassistance.de/jquery-plugins/jquery-plugin-treeview/