ProduKey is a small utility that displays the ProductID and the CD-Key of MS-Office, Windows, Exchange Server, and SQL Server installed on your computer. You can view this information for your current running operating system, or for another operating system/computer - by using command-line options. This software can be useful if you lost the product key of your Windows/Office, and you want to reinstall it on your computer.
ProduKey enables you to retrieve the ProductID and the CD-Key for your Windows installation, as well as MS-Office and SQL Server if they are installed. The software is easy-to-use, just run it, and it will display the keys for you.
ProduKey doesn't requite any installation process or additional DLLs. In order to start using it, just run the executable file - produkey.exe
The main window of ProduKey displays the list of Windows, Office, and SQL Server products installed on your system. For each product, the "Product ID" and "Product Key" are displayed. If you want the view the product key information in another computer, or in another operating system within the same computer, use the command-line options below.

Command-Line Options
/remoteall Enumerate all computers on your local network, and load the product key information from them. Be aware that this option is quite slow, and you may need to wait a few minutes until the product key information is displayed. In order to use this option, you must have Administrator privileges in all computers on your local network.
/remotealldomain [Domain Name] Enumerate all computers in the specified domain, and load the product key information from them.
/remote [Computer Name] Load product key information from the specified computer name. In order to use this option, you must log in to the remote computer with Administrator privileges.
/iprange [From IP] [To IP] Load product key information from all computers in the specified IP addresses range. In order to use this option, you must have Administrator privileges in all these computers.
/remotefile [Computer Names Filename] Load product key information from all computer names specified in the file. The file can be tab-delimited, comma-delimited, or CRLF-delimited. In order to use this option, you must have Administrator privileges in all computers specified in the computer names file.
/windir [Windows Directory] Load product key information from another operating system on the same computer. The [Windows Directory] specifies the base folder of Windows installation, for example: c:\windows, c:\winnt
This feature is only supported on Windows 2000/XP.

/regfile [Software Registry File] Load product key information from another operating system on the same computer. The [Software Registry File] specifies the program registry file usually located under c:\windows\system32\config
This feature is only supported on Windows 2000/XP.

/nosavereg Load ProduKey without saving your last settings (window location, columns size, and so on) to the Registry.

You can also combine the above command-line options with the following save options in order to save product key information to file: /stext <Filename> Save the list of product keys into a regular text file.
/stab <Filename> Save the list of product keys into a tab-delimited text file.
/stabular <Filename> Save the list of product keys into a tabular text file.
/shtml <Filename> Save the list of product keys into HTML file.
/sverhtml <Filename> Save the list of product keys into vertical HTML file.
/sxml <Filename> Save the list of product keys into XML file.

The license of this software is Freeware, you can free download and free use this password manager software.