1. TheSortableTree

Nested Set + Drag&Drop GUI. Very fast! Best render helper!2000 nodes/sec. Ready for rails 4 (RubyGems)

gem ?'awesome_nested_set' ?# or any similar gem (gem 'nested_set')

gem ?"the_sortable_tree" , ?"~> 2.3.0"

application.js

//= require jquery

//= require jquery-ui

//= require jquery_ujs

//= require jquery.ui.nestedSortable

//= require sortable_tree/initializer

application.css.scss

*= require tree

*= require sortable_tree

*= require nested_options

other documents view the gemdoc.