Yes TomTom does sell mapping software for their GPS units. Most of the new GPS systems come with a cable that you will link to your computer to update the maps and features of your TomTom.
Garmin Mapping Software is available with or without a GPS sensor depending on your laptop configuration. Try Garmin Mobile PC.
There are multiple laptop gps softwares available.One of the leading softwares is the Garmin Mapsource Inland Lakes Gps Software.
Looks like you'll generally pay about $50-$100 for GPS mapping software.
GPS technology can be used in map making by accurately collecting geographic data such as coordinates and elevation points. This data can then be integrated into mapping software to create detailed and precise maps of specific areas. GPS also allows for real-time mapping and updates, making it a valuable tool for cartographers and geographers.
Garmin mapping refers to the map updates you can download for your GPS software. You can get these maps and more at http://www.garmin.com/unlock/update.jsp.
Most personal GPS systems come with software to download to your computer. You may also be able to track them online.
Locate restaurants, airports, and points of interest.
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The iPhone has both SMS (for texting) and GPS (for mapping).
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There are continuous updates available for the GPS, including firmware, software, operating system updates, web updates and mapping system updates. The updates are available for Garmin here http://www8.garmin.com/support/download.jsp