A couple of options for GPS aficionados are TopoFusion and MotionBased. There is a chapter on TopoFusion in my book, GPS Mapping. And here is a a review I posted about MotionBased.

Rich Owings
www.MakeYourOwnMaps.com
www.GPStracklog.com

"We were desert mystics, my friends and I, poring over our maps as others do their holy books." - Edward Abbey