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QMapControl is a Qt widget which enables your applications to use map data from different sources on desktop or mobiles. Maps can be enriched by custom objects which will be drawn into the map.
QMapExplorer is an application to access, view and explore tile based online maps like OpenStreetMap or GoogleMaps. This is the first beta release with serious functionality. Enjoy!
Ertha is an open source GIS whose main focus is to guarantee easy extensibility and straightforward integration of custom modules. It provides basic geographic rendering and topologic analysis and exposes the main data structures loaded from shapefiles.