Free CSS Drop-Down Menu Framework allows you to create your own themed CSS drop-down menu within minutes by just editing the CSS files included. You don’t have to worry about the markup (XHTML) because it’s already well-structured and is semantically coded. This fantastic menu is compatible with Windows Internet Explorer 6 or later, Mozilla Firefox 1.5 or later, Opera 7 or later, Apple Safari 2 or later, Google Chrome and probably most of the less known browsers in the market. However, for IE6 it uses a JavaScript in order for the drop-down to work.

The CSS drop-down menu also comes with predefined transformations, including horizontal, vertical left-to-right, vertical right-to-left, horizontal linear and horizontal upwards – all you need to do is to change the class name of the unordered list <ul>. Should you have difficulty in making your styled CSS drop-down menu, just look at the examples which mimic the menus at Adobe, Flickr, MTV and NVidia.

Documentation: http://lwis.net/free-css-drop-down-menu/
Demo: http://lwis.net/free-css-drop-down-menu/dropdown.ultimate.horizontal.html
License: GNU GPL