Aqua Dock is a nice application that will allow you to have an OS X style, nice animated launchbar / taskbar on your screen that will react to your mouse when you mouse over it.

Users can customize the look of each item on the dock and set various animation options for when the mouse is over an item on the dock. It is very easy to configure.

In short, Aqua Dock is a task bar and a Windows program launcher that does it with Apple's style.

There are no docklets available, but they can be downloaded from
http://www.yzdocklets.com (Aqua Dock supports YzDock Docklets)
1. Right click on the dock and click on Add Docklet
2. Choose a docklet and click Add