SW Maps - SW Maps app enables users to record points, lines, polygons, and images to view them on the desired type of map.
Topography APP - Topography APP enables users to geofence and surveys land by using your mobile phone.
Orienteering Compass & Map - Orienteering Compass & Map is an app by Calmatics that allows users to find direction and measure the distance from your location.
FieldMove Clino - FieldMove Clino app allows users to use their mobile phones as a digital compass to capture direction data on it.
OsmAnd - Global mobile map viewing and navigation for online and offline OSM maps
QGIS - QGIS is a desktop geographic information system, or GIS.