Take a look at Backcountry Navigator - http://www.backcountrynavigator.com/. There is a trial (download the beta) and it's pretty cheap at $30 if you decide to buy it. The only other one I know of is MemoryMap - http://www.memory-map.com/index.html? - but I've never used it. And I think it's about $100. Enjoy! - sheureka

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