Otaku Software TopDesk

TopDesk is a Alt-Tab task switcher between applications replacement for Windows XP which allows you to instantly view thumbnails of all open windows, display thumbnails of windows belonging to the current application, or hide all windows to quickly access the desktop with a single key press. The latest version of TopDesk, TopDesk version 1.4.2 has incorporated Windows Vista Flip 3D feature which allows open windows to flip and tilt in a sliding sideway stack with transparent windows effect in 3D layout.

The features of Otaku Software TopDesk include:

Displays thumbnails of all applications, including minimized applications, in 2D and 3D views.
Shows thumbnails of all windows belonging to the current application.
Hides all windows for quick access the desktop.
While tiled, can display the title of the currently selected window or the titles of all tiled windows.
Windows can be closed and minimized/restored while tiled.
Completely configurable: Hot keys, mouse hotspots, floating buttons, window titles, and performance settings can all be changed.
Supports multiple monitors.
Using the new Windows Aero technology, available in Windows Vista Home Premium, Business, and Ultimate editions, Windows Flip and Windows Flip 3D render live thumbnail images of the exact contents of your open windows, making it easier to identify the one you want. Windows Flip improves on the ALT+TAB method for flipping between windows, while Windows Flip 3D dynamically displays all open windows in a graceful three-dimensional view.
Windows Flip 3D

Windows Flip 3D uses the dimension of visual depth to give you a more comprehensive view of your open windows, helping you sidestep chaos even as you juggle myriad open files and programs.

Windows Flip 3D can even render images of live processes such as currently playing video. Use the START+TAB keys to initiate the 3-D view, then flip through open windows by using arrow keys or the scroll wheel on your mouse to quickly identify and select the one you want. Navigating your desktop has never been this fun.
Windows Flip

Windows Flip is a Windows Vista update of the feature known as ALT+TAB in previous versions of Windows. By repeatedly pressing ALT+TAB, you can scroll through a visual list of your open files and programs. Using Windows Aero technology, Windows Flip renders live thumbnails of the exact contents of those open windows instead of generic icons, making it easier to identify the one you want.

In Windows Aero, live taskbar thumbnail images display the actual contents of both windows that are currently open and those that are minimized in the taskbar. When you rest your mouse pointer on a tile on the taskbar, you'll see the "live" contents of that window without having to bring it to the foreground.