Peter Westwood

This plugin allows you to run loops within your WordPress templates where you query for children of the current page.
The plugin extra arguments to the list of arguments supported by query_posts().
The query argument <code>child_of</code> is used to add a WHERE to the database query to limit the pages returned to those with a post_page equal to the argument provided.
The query argument <code>child_limit</code> is used to limit the number of pages returned.
The query argument <code>child_offset</code> is used to offset the limiting to allow for pagination if required.

PJW Query Child Of

This plugin allows you to run loops within your WordPress templates where you query for children of the current page.

macbookandrew

This plugin adds the css class <code>.has-children</code> to menu items that have a submenu to allow css styling.

Menu Child Indicator

Adds the css class .has-children to menu items that have a submenu to allow css styling.

PJW Query Child Of vs Menu Child Indicator