hildende

With installing this plugin you add functionality to <code>wp_nav_menu()</code> to show 
only children of the current page or start with a specific navigation level.

Child Navigation

Adds support for child navigation to wp_nav_menu()

Manoj

Allows you to create multiple sub-pages in a batch/bulk manner saving time at any time in your WordPress site. 
This plugin will give you a startup screen in which you can add as many sub pages in a quick manner and then by clicking one button will create all the sub pages for your selected page as parent.

Easy Bulk Subpage Creator

A handy tool for bulk sub page creation.



Excellent

A handy tool for batch creation of sub-pages for any page.

Child Navigation vs Easy Bulk Subpage Creator