JavaScript is a very powerful language. When combined with nice design and dock functionality you get desktop-like feeling. Even though I don't have any of Apple's products (hope this will change soon) I am in love with that company. The introduction of Mac OS X Dock brought us innovative ideas of handling menus. Here's the list of the best ones I came across.
Browsers: IE 6, IE 7, Opera 9, Firefox 2, and Safari 2
Demo
Browsers: Firefox 1.5 on Mac OS
X, Firefox 2 on Ubuntu Linux, Firefox 2 on Windows , IE 6,
IE 7, Konqueror 3.5 on Ubuntu Linux, Opera 9 on Windows, Safari
2 on Mac OS X
Demo
Browsers: PC & Windows XP:Mozilla
Firefox 2.0, IE 6, IE 7. Apple Mac & Mac OS
X : Mozilla Firefox 1.5, Safari 2.0
Demo
Browsers: ?
Demo
Browsers:?
Demo
Browsers: IE, Firefox , Opera and Safari
Demo
Browsers: ?
Demo
Browsers: IE 7, FireFox 2.0.0.4, Opera
9.21, Safari (for windows) 3.0.1
Demo