Nested Pages provides a drag and drop interface for managing pages & posts in the WordPress admin, while maintaining quick edit functionality.

A small plugin which allows you to use nest shortcodes (i.e. a shortcode within an enclosing shortcode) by implementing a simple do_shortcode filter

Add some hierarchy to your nested lists.

WP Load Gallery brings image, video, post, category management to WordPress.

A small plugin which allows you to use shortcodes as the attribute of other shortcode, shortcode inside shortcode, dynamic shortcode.

Wordpress plugin that provides a widget that lists pages in a collapsible list

Add threaded (nested) reply functionality to bbPress.

Simple plug-in for editing the parent comments to any user comments. Use it to edit the threaded structure comments.

Nest menus as items to avoid giant navigation menus in your admin.

The Simple Nested Menu is a fast and lightweight plugin that displays menu items in a nested sliding style.