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.
Planimeter - Planimeter app allows users to effortlessly calculate the accurate distance between two points on the map.
Geopointe - Geopointe enables Salesforce users to gain spatial insights via maps and apply geography to business processes.
Mobile Topographer Free - Mobile Topographer Free app provides features through which users can mark their properties right on the mobile phone screen.
ArcGIS Online - GIS
GPS Waypoints - GPS Waypoints is an app by Bluecover Technologies that comes up with features to help you in becoming a professional surveyor by taking a survey of the land for planning as well we for entertainment purposes.