Dropdown menu widget automatically generates pages and categories menus. While generating page menu, it uses Page Order specified on Add New Page screen.
Read more [How to] Change Order of Menu Items in Dropdown Menu
Subpages Extended allows you to create dynamic sub-page indexes on your WordPress blog. Using its powerful shortcode “[How to] Sort Your Pages List with SubPages Extended Shortcode” doesn’t have any sub pages. you can easily generate page indexes. In this post, I will show you how to sort your pages.
Read more [How to] Sort Your Pages List with SubPages Extended Shortcode