Plugin to manage Menus

Hi,

Is there a plugin that can help manage the menus when one creates custom menus? So not a plugin to create the menus as such, but when one has a lot of entries in the Main Navigation for example and would like to move the menu items around, it’s a bit tough when the list goes “off” the bottom of the page and one has to scroll a lot.

So maybe a plugin that can collapse the menus in the backend.

Cheers and thanks in advance
tdako