LicenseCrawler - is a useful utility from Martin Klinzmann that scans through the Windows registry, extracting license key and serial number information.The license information includes that of popular Microsoft products, such as Office, as well as Nero, VMWare and a whole host of other popular applications.
Since installation is not required, you can store LicenseCrawler on a USB flash drive, external drive or similar storage unit, save it to any computer and run it.
Additional tools of LicenseCrawler let you encode or decode Base64, translate ASCII into decimal or hexadecimal, calculate MD5 or SHA2 checksums, as well as to check an Adobe key. Furthermore, you can save the configuration settings for further use, switch to a different language for the UI, and view log details.
The program has a good response time, swiftly completes a scan job, and uses a moderate quantity of CPU and system memory. It didn't cause us any trouble during our tests, such as making Windows hang, crash or pop up error notifications. All in all, LicenseCrawler is a reliable tool for finding out product licenses on a computer.
Download: 
LicenseCrawler 2.15.2842.rar - 2.8 MB
LicenseCrawler Commercial 2.3 Build 2546 Portable (2 MB)