QGIS - QGIS is a desktop geographic information system, or GIS.
Planimeter - Planimeter app allows users to effortlessly calculate the accurate distance between two points on the map.
Esri ArcGIS - ArcGIS provides contextual tools for mapping and spatial reasoning so you can explore data & share location-based insights. ArcGIS is the heart of the Esri Geospatial Cloud. Try ArcGIS for free with 21-day trial.
Mobile Topographer Free - Mobile Topographer Free app provides features through which users can mark their properties right on the mobile phone screen.
Geopointe - Geopointe enables Salesforce users to gain spatial insights via maps and apply geography to business processes.
Lefebure NTRIP Client - Lefebure NTRIP Client app offers features to lets you connect to a large number of high accuracy GPS, GNSS, DGPS, or RTK in order to lo all your NMEA position data to your mobile phone’s internal storage.