Top of the line mapping software tha will give you "LIVE" updates of your position using a GPS and your laptop. I use this software myself!
You must have a look at this folks, one of the best free programs available! Satallite, topo and amazing tools to aid your research.
Great Mapping And Research Tools for the gold prospector. Stop on in!!
A very interesting and useful program well worth a look.
TopoZone offers free interactive mapping with several different search options. A great research tool with lots of features for free! There is also an option to purchase even more exciting mapping options.