Jalapeno Keyfinder is a lightweight utility for Windows Vista and XP that allows you to retrieve/find/locate CD/serial keys for around 160 Microsoft/non-Microsoft applications, software titles and games that may be installed on your computer such as Windows, Microsoft Office, Call of Duty, Unreal Tournament, VMWare Server, mIRC, Corel, Need for Speed, etc. A complete list of supported programs can be found in the readme file.

You can also choose to:

-Save the list of products along with their CD keys as a text file
-Copy the CD/Serial key to clipboard

Downlaod Jalapeno Keyfinder v 1.03 here