WinFlip

WinFlip is a free program that lets you switch between open windows in Flip 3D style. This means you can see a preview of all open windows in 3D space, and quickly find the one you're looking for. WinFlip is a great way to increase your productivity and efficiency while working on your computer.

WinFlip is very easy to use. Just press the Alt+Tab keyboard shortcut, and WinFlip will appear. You can then mouse over the preview windows, and select the one you want to keep active. WinFlip also supports switching windows using the keyboard.