LicenseCrawler is an effective little program which essentially scans the Internet for software license codes in the odd chance that you've misplaced your own or the one that came with your software is not working. It is a freeware license scanning application that's straightforward, portable, user friendly and reliable.
Here are some screenshots to illustrate the features and user interface of this application:
Alternate Password DB
Bitwarden
Dashlane
Buttercup
Password Safe