Sergey Biryukov

Restores and enforces the bundled jQuery in the admin if your theme registers a newer version which may not be compatible with WordPress yet.
You can try this plugin <a href="http://wpdevel.wordpress.com/2011/02/10/if-your-menus-or-widgets-screens-broke/" rel="nofollow ugc">if your menus or widgets screens broke</a>.

Restore Bundled jQuery

Restores and enforces the bundled jQuery in the admin.

Human Made

Joe Hoyle

WordPress Menu Exporter lets you only export your WordPress Menus (like you can with Posts, Pages etc). The WordPress Menu Exporter plugin will also export and pages / terms that are referenced in yoru WordPress Menu.

WordPress Menu Exporter

Still works! Make export for nav items and creates a file that imports both nav and pages.

Love this plugin

A plugin taht lets you export only your WordPress menus via the WordPress Export page.

Restore Bundled jQuery vs WordPress Menu Exporter