You could have downloaded MasterKing 2.3 from our software library for free. The actual developer of the program is HPC, Inc. MasterKing lies within System Utilities, more precisely Device Assistants. Our built-in antivirus scanned this download and rated it as virus free.
From the developer:
MasterKing® creates superior master keying systems faster than ever before. Enter some basic information and MasterKing® will generate your systems quickly and easily! MasterKing® eliminates transposed or repeated numbers, as well as uncuttable keys. Manually writing master key systems can be very time consuming and error prone.
You may want to check out more software, such as MyGPS, which might be similar to MasterKing.