YUI Tree plugin
The YUI Tree plugin makes it relatively easy for Ruby On Rails v2.3.x applications to use the Yahoo User Interface Library TreeView component from YUI 2.7.0.
For more information including installation instructions, please see the plugin technical documentation. A source code tarball is available from this page for those who wish to browse through the source code on their local machine without having to ask Subversion to fetch it first. For more technical information or to submit fault reports, feature requests and so-on, please visit the plugin's RubyForge project page. If you prefer to use Git and GitHub rather than Subversion and RubyForge then you please look here.