PowerToys add fun and functionality to the Windows experience. What are they? PowerToys are additional programs that developers work on after a product has been released.
And there is some interesting stuff there. For example, add ons like these:
Alt-Tab Replacement
With this PowerToy, in addition to seeing the icon of the application window you are switching to, you will also see a preview of the page. This helps particularly when multiple sessions of an application are open.
Tweak UI
This PowerToy gives you access to system settings that are not exposed in the Windows XP default user interface, including mouse settings, Explorer settings, taskbar settings, and more.
Image Resizer
This PowerToy enables you to resize one or many image files with a right-click.