From Max Bylesjo:
Helps you keep track of your serial numbers. Easily add the program and its associated serial to a list (a .MSS file), and browse it later. Sorted alphabetically (ascending or descending), the list is easy to view and edit.The list can store extensive file information: Program name, Serial number, Manufactor's Name, OS and fileversion. Once you stored the information, you can easily edit it. Search for a specific entry in the categories listed above, without any fuss! You can import entries from another list, if you happened to store them separately. The newly implemented MSS format encrypts all information, so that you won't be able to view it from a simple text editor. This also makes MaxSerial an excellent program for storing other critical information such as passwords.