I recently found this article here. I am reprinting the menu techniques here for my later reference. It has been a while since I’ve done a good deal of new website development, but I think this information could come in handy when I get back to it.
This example takes semantic ordered or unordered list of links and turns it into a dynamic drop down menu system that can be vertically or horizontally oriented.

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A technique for animating menu items when a user hovers over them. Source files, including the PSD file, are available to download.

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Gaya Kessler presents a wonder JavaScript menu that mimics the real garage door using jQuery.

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A very unique menu that floats on the page. Users can drag it to a position they desire.

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HVDesigns presents a menu that drops down and reveals more links.

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You can have scrolling tabs with animation using this technique.

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Antonio Lupetti presents a Digg-like menu that uses simple JavaScript.

When you hover an item, you’ll see the CSS sliding door technique created using jQuery. An alternate version for MooTols can be here.

If you’re a big fan of the Mac dock you will enjoy this menu.

A great technique for integrating accordion-style menus into your site.

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This sliding hover effect script is an easy technique for highlighting menu items.

This technique allows you to fade in and fade out menu items.

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A simple JavaScript drop down menu tutorial.

A technique for creating animated menus using jQuery and CSS background-position properties.

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A menu using MooTools that expands the link’s font size when you mouse over the item.

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This is an accordion plugin which can be used as a vertical sidebar menu too.

Another JavaScript menu based on MooTools with lots of features.

Easily separate content using this tab example.

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A customizable right-click menu written on top of the Prototype framework.

This menu example allows you have two levels of navigation. When you click on main category the subcategory expands.

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