CodeCanyon - UberMenu v2.3.2.1 - WordPress Mega Menu Plugin | 724 KB
UberMenu is a user-friendly, highly customizable, responsive Mega Menu WordPress plugin. It works out of the box with the WordPress 3 Menu System, making it simple to get started but powerful enough to create highly customized and creative mega menu configurations.
DEMO:
http://codecanyon.net/item/ubermenu-wordpress-mega-menu-plugin/154703