gormer

The purpose of this widget is to take an existing page and show it 
inside a widget that you can add through the regular widget system in 
WordPress.
I would rather recommend you to use https://wordpress.org/extend/plugins/spectacula-page-widget/ because it’s much better.The purpose of this widget is to take an existing page and show it 
inside a widget that you can add through the regular widget system in 
WordPress.
I would rather recommend you to use [https://wordpress.org/extend/plugins/spectacula-page-widget/ Spectacu.la Page Widget] because it’s better tested and maintained.
<h3>Plugin Name</h3>
Contributors: gormer 
Donate link: 
Tags: widget, page 
Requires at least: 2.0.2 
Tested up to: 3.0 
Stable tag: trunk
Creates a widget out of any page.

Simple Page Widget

jeff.cave

This plugin provides a “Sub Page” widget. It lists all of the pages which are children of the current page. If there are no children, it will not display.
Options include:
<ul>
<li>title (obviously)</li>
<li>“No Sub-pages” text instead of blank (configurable)</li>
<li>hide widget when no sub-pages</li>
<li>show siblings when no sub-pages</li>
</ul>
While this is a small widget, I have attempted to make this as configurable as possible, with clean and efficient code (this is a small widget, and shouldn’t slow your site down).

PS Sub-pages

Shows the child pages of the current page. Configurable title, show siblings (or not), and "no child" text

Simple Page Widget vs PS Sub-pages