PeakFinder is an app designed to help users identify mountains and peaks in their surroundings. The app uses augmented reality technology, the GPS receiver and built-in sensors of your mobile device to overlay information about the names and elevations of mountain peaks onto the camera view.
AGPS-TrackerOm is an interesting and very robust Android application. It's main function is to follow preloaded tracks and record your tracks, as many other apps do, but it does so reliably - ensuring that the GPS data is recorded at all times, even when the phone goes into stand-by mode. This means you won't get surprise straight lines in your GPX tracks. It can also provide enhanced accuracy of your current elevation, by using altitudes from NASA-generated Digital Elevation Models (DEMs).