CodeCanyon - Menu with CSS3 Effects and Notification Bubbles v2.0
This Menu with CSS3 Effects and Notification Bubbles has everything you need. The functionality is divided in different parts and that makes it very powerful.
The core is a rock solid base for every css menu with unlimited menu levels and a mega menu. The effects are pure css, but you can use the jQuery plugin for support in older browsers. The menu styles are also pure css and there are no images used.