Official Web Site:  http://kapeli.com/dockview/

DockView is a Snow Leopard-only application that extends Apple’s
Dock and shows window previews whenever you hover your mouse over * 
an application or while using CMD+Tab. It helps you visualize the 
windows you currently have open and easily find the window you
are looking for.

Features:

* Live previews. The previews refresh constantly so you can keep an eye  on windows without activating them.

* Customizable. The previews can be any size you want and you can
  choose between six different styles.

* Badge Dock Icons. DockVi

* New can badge Dock icons with the number of windows that each
   application has open.

 * Activate windows. Click anywhere on a preview to activate the
    window.

* Close windows. You can use DockView to easily close windows.

* Spaces. DockView can show the Space number to which a window 
   belongs to.

* No hacks. DockView doesn’t modify the Dock or any system file.

Control Applications:
* Window previews for iTunes show skip, play and pause buttons.
* Window previews for iCal show upcoming events for the current day.

* Window previews for QuickTime show play and pause buttons.

* Window previews for VLC show skip, play and pause buttons.

* Window previews for Mail show a “Get Mail” button.

System RequirementsL

OS X.6 (Snow Leopard Only)

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