jQuery treeview plugins have expandable and collapsible treeview features. These are lightweight and flexible jQuery Plugins, which transform an unordered list into an expandable and collapsible tree.
Treeview – Expandable and Collapsible Treeview jQuery Plugin
jQuery Treeview is lightweight and flexible jQuery plugin, with an unordered list into an expandable and collapsible tree, great for unobtrusive navigation enhancements.
jqTree is a customizable jQuery treeview plugin with drag & drop support for tree nodes.
Nestable is jQuery treeview plugin with drag & drop feature to rearrange the order. It also works well on touch-screens.
aciTree is a customizable cross-browser treeview jQuery plugin. It offers a API for controlling things down to the element level and it has built-in functionality to load the entire tree with AJAX.
zTree is a great tree view jQuery plugin. The main advantages of zTree includes excellent performance, flexible configuration, and the combination of multiple functions.