This plugin adds the ability to put a tag in your page entry and have it display a list of pages. By deafult it will show the subpages of the page that it is on, but it will accept any of the options the wp_list_pages template tag will except title_li and echo. It is very simple to use, just put the Tag in the entry for your page where you want the list to appear. There is one option in addition to the wp_list_pages ones. Specifying a css_class will override the default of xls_list for the class of the surrounding ul. It supports multiple uses of the tag with different options on one page.
List Subpages Plugin for WordPress to show sub pages