dhtmlxTree Professional Edition Features:
Context Menu
OnDrop event handler
Additional Drag-n-drop behavior – drop-as-sibling
Drag-n-drop between frames
Focus item with script method
Dynamic rendering – advanced xml processing for loading big trees when dynamical loading can't be used
Serialization – possibility to create XML based on updated tree structure.
Search
Multi-line tree items
Saving/Restoring tree state in/from cookies