Spotted at AppBrain which may just be useful for airsoft events on a large terrain or milsim games. This costs US$2.13 to download and runs on Android version 2.1 or higher...  "This application seeks to replace expensive GPS navigators used for training and competitions Airsoft transforming your device into an efficient navigation. To make the app easy and immediate use was equipped with 2 simple keys that allow 2-3 touches to have their position or enter the coordinates of the position to be reached. Once you have entered GPS coordinates of the destination Airsoft load the fastest route to reach the desired position illustrating the route to be flown on a satellite map.

Features:

• Quick Entry of coordinates.
• Follow path shown by the map.
• Finding the coordinates of your location."