thewebist

A widget for displaying a list of subpage links. The list remains consistent regardless of where you are in the hierarchy.
Other features include:
<ul>
<li>Widget displays only on pages with subpages or on subpages.</li>
<li>List title is a link to the main page parent.</li>
<li>You can specify the link text for the list title, or you can completely hide it.</li>
<li>Sort subpages by Menu Order or Page Title.</li>
<li>Specify the depth of pages shown (all in hierarchy, all in flat list, 1 level, 2 levels, etc.)</li>
<li>Presentation utilizes minimal markup to allow for easy styling via your theme’s CSS.</li>
</ul>

WenderHost Subpages Widget

A widget for displaying a list of subpage links. The list remains consistent regardless of where you are in the hierarchy.

Nile Flores

WP Subpages Widget is a simple plugin to allow for multiple instances to show child pages. For people who use multiple template files for each of their site’s pages, having the capability of using a widget, rather than hardcode subpages of a parent or child page.
While the WordPress 3.0 Menu System allows users to be able to create a menu system with child pages, this plugin works with the natural Page hierarchy. It’s great for sections of the website that have sub pages like alphabetical pages, and more.

WP Subpages

WP Subpages Widget is a simple plugin to allow for multiple instances to show child pages.

WenderHost Subpages Widget vs WP Subpages