SubPages is a small widget which you can use to show all pages from a root page as a menu in the sidebar.
The Sidebar Widget Plugin is easy to integrate and maintainable content provider for your page, but one aspect was missing from my side. The pages widget displays all pages, but I liked only to display the pages which are children from the current root page. For this reason I wrote the SubPages widget for the Sidebar Widget.
Usage: In the Themes->Sidebar Widget you see in the available widgets section the Sub Page Widget, which you can drag and drop on your side bar. You can add a Title which should be displayed in the title of the widget. This will be combined with the title of the Root Page. If you leave the title empty only the root page title is displayed.
If a page does not have any child pages this widget is not displayed.