WinGuggle

WinGuggle is a utility that allows you to see the key for all your installed software, including the one for your operating system, regardless if its Windows XP, 7, or even Windows 8.

The program is very easy to use and doesn't require installation. All you will have to do is decompress the contents of the compressed file on your desktop and run it. In just seconds it will give you the key to your operating system, and by changing to another tab you can view the key for the rest of your installed programs.

WinGuggle is a small and easy-to-use program with a simple mission that it fulfills to perfection. The next time you need your Windows key, you won't have to look for it on any sticker or have to type it out bit by bit--all you'll have to do is copy and paste.