The is truly one of the handiest apps I've found. The Maps Ruler calculates the distance between selected points. It helps you find the shortest way from one location to another or calculates the distance for a route you wanty to take. It is a must have on your cell phone if you are a hiker, runner a biker, a driver or even a pilot. It's even sensitive enough to use on the golf course or while fishing in a boat on a river or a lake.
Search Word Pro http://searchwordpro.com
Recreation
Wilderness Area Maps
If you are an avid hiker, this link opens up topo maps for the hundreds of wilderness areas in North America.. The Wilderness.net map portal is one of the most valuable places you can go to plan your trips and see what the terrain looks like where you are going.