Visual Tooltip makes it possible to show a thumbnail of a window by putting the mouse cursor over a button of the taskbar. It looks like the visual effect included in Windows Vista, but without having to install Vista.

The displayed thumbnails can be moved anywhere on the desktop and also added to a "dock bar", which may function as a taksbar if you hide the default Windows bar as you can also add your shorcuts and quick launch icons to it.

Thumbnails on the dock bar can have diverse degrees of rotation, by pressing the Ctrl key and moving the mouse over them, without clicking.