7 Sidebar emulates the good old sidebar of Vista in Windows 7 and even adds some nice features to it. No setup or anything special required. Just start the gadget and you have a sidebar. The sidebar can hold any gadgets and stays visible even if a window is maximized. With one click you can switch to a window-manager with live-thumbnails. The thumbnails can be configured to update even if the window is minimized.
The license of this software is Freeware, you can free download and free use this desktop utility software.