Here is a small selection of jQuery plugins you can use to vamp up your site navigation.
I have put together a short list of jQuery navigation plugins that could vamp up your sites navigation. From drop-down menus, to breadcrumbs.
(mb)Menu is a powerful plugin to quickly build multilevel menus. It also validates to W3C XHTML 1.0 standards.
jqDock can transform a set of images into a Mac OSX style dock menu.
Useful for deeply nested pages. Instead of limiting the amount of pages, you can easily create collapsible breadcrumb with this plugin.
Quickly transform unordered lists into a Windows-style tree menu. Useful for browsing directories.
Adds icons to external links. You can use your own icon or use the target sites favicon. Author’s website is in French.