7stacks is a free utility for Windows 7 (also works in Vista and XP) that lets you create stacks just like on the Mac. It's the perfect way to reduce icon clutter on your Windows 7 taskbar, by combining groups of applications into a single icon. You also have a variety of different appearances and options to customize exactly how you want your stacks to look.

7stacks was created because of my own frustrations with Windows 7, as great an OS as Win7 is. Because Windows 7's new taskbar, called the SuperBar is very similar to the Mac OS X Dock, many comparisons are going to be made. But Windows 7 seemed to have one glaring omission of OSX: stacks. Now, with 7stacks, you get almost the same functionality as the OS X stacks, but with a more "Windows 7" appearance.

Check out these features:
1. In 7 and Vista, 7stacks uses Aero, making the stacks look like part of Windows itself.
2. Browse subfolders within a stack, just like in OS X Snow Leopard.
3. 3 different styles of stacks: Normal, Grid, and Menu
4. In Windows 7, create a new stack by right-clicking on any stack and selecting "Create New Stack" from the JumpList entry.
5. In Menu mode, 7stacks doesn't even need to be in a toolbar. You can use it right from your desktop, or any other folder.
6. Pin up to 10 different stacks on the Windows 7 taskbar

The license of this software is Freeware, you can free download and free use this desktop utility software.