Enhanced Navigation Menu Widget.
This is a simple admin design that makes your WordPress administration section more clear and relaxed.
Zen Menu Logic allows the user to select any of several custom menus to appear on a per page basis.
Folder Menu Vertical is a flash dynamic menu module for your WordPress 3.0+ website, designed to meet your needs and preferences.
Custom Page Menus plugin allows custom menus to be defined on a per-page basis.
Menu with Page Assignment Widget
Allows you to add a custom menu to individual pages.
Show a list of links to other pages within the same section, as defined in a custom menu. Great for CMS.