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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.
CUAHSI OpenHIS: Open Hydrological Information System is sponsored by National Science Foundation to develop infrastructure and services for the advancement of hydrologic science and education developed by Joe Hu,MapWindow software lab,Idaho State Univers
These application use the location-aware and GPS-repository interfaces of AnnotatedEarth.com. AnnotatedEarth.com provides a architecture to enable location-aware technology, for finding interesting locations around a user.
A Map Server, Viewer & Editor partially implementing the W3 standards for GML & SVG with some extensions to aid in designing and maintaining the PSTN cable networks (and other networks) in city scale.