You could have downloaded MapSource - WorldMap 6.1 from our software library for free. The software is categorized as System Utilities. The actual developer of the software is Garmin Ltd and its subsidiaries. The following version: 6.1 was the most frequently downloaded one by the program users.
From the developer:
MapSource products provide geographic data in CD-ROM/DVD-ROM format that can be viewed on a PC. Additionally, some Garmin units can accept map downloads from various MapSource products to augment the detail already on your Garmin GPS basemap.
All MapSource products include the trip and waypoint manager functions for transferring waypoints, routes, and tracks.
You may want to check out more software, such as Garmin MapSource, MapSource - US Topo or MapSource - BlueChart Pacific, which might be related to MapSource - WorldMap.