**Subpages in Context**
„http://wordpress.org/extend/plugins/subpages-in-context/“:http://wordpress.org/extend/plugins/subpages-in-context/
Lists pages and subpages for a given page, or the top ancestor of the current page and all of the ancestor’s descendants.
A common web design pattern is to have a primary navigation with the top level pages, and then a separate navigation element on each page that shows only those pages related to a common top-most page. This widget helps to build those secondary navigation elements.
