Menkii

The administrator is able to select a menu(from menu editor) in post/page editor. The navigation menu will be outputed with help from page_navigation_menu() function.

Page navigation menu

The administrator is able to select a menu(from menu editor) in post/page editor. The navigation menu will be outputed with help from page_navigation_ …

TheGuit

neOceane

Improved Nav Menu allows user to switch the link of a menu item. 
For example, if you want to redirect a page to her child, you don’t need to create a redirect page template and use an additional loading for the the first page.
Plugin page : http://www.neoceane.com/plugins-wordpress/neoceane-improved-nav-menu/

Improved Nav Menu

Improved Nav Menu allows user to switch the link of a menu item. And many other cool stuffs.

Page navigation menu vs Improved Nav Menu