Nice and simple plugin that lists the children of a certain page or post in link format.

This is a plugin to hide pages from navigation and/or search results using custom fields, parent and child pages are supported too

This widget plugin will display a backlink to the parent page at the end of subpages

Add template file loading rule for 'Pages'. When loading the template of the child page, preferentially loading the template file that concatenated parent page slugs.

Change Attachment Parent allows you to edit the parent value of anything in the media library.

Inherit the featured image from the Post, Page, or Custom Post Type parent, grand-parent, great-grand-parent, etc.

Set any post type (or types) as parent of any post type. Any post structure can be created with this plugin.

A great way to show group of fields only on grandchildren pages

Earn money by referring students to The Knowledge Roundtable. Easily show tutors from The Knowledge Roundtable's tutor directory on your site!

This plugin is intended for use by theme developers to hasten coding and to save the world from tyranny. But mostly the theme dev bit.

Provides the ability to set the parent_id of a new page from within the link to the new page form

Create templates for a specific page by its ID. Subpages inherit templates from their parent pages.

An easy widget to let you show a clickable list of pages linked to a particular 'parent' page on your site

Remove Parents is a tiny plugin which remove "category" and parent categories from permalink.

The total in-page navigation solution for Wordpress. Using the shortcodes and widgets provided you can display navigation between your parent, child and sibling items in any format you can think of. Additionally by way of shortcode allows category post functionality.

Adds classes to first, last, parent, even and odd elements of wp_page_menu and wp_nav_menu.

Show all categories linked to a blog post/page, or list data such as: title, id, author details, tag.. & add hyperlinks or filter on specific data!

Working with WordPress hierarchical category and customized hierarchical taxonomies created by Custom Post Type UI.

Enhances the body_class template tag, adding some extra classes to the body (post/page slugs, post categories, and archive parent categories) useful in developing custom themes.