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
Build WebGIS based on Google Earth. Just 7 steps to complite a WebGIS Web Application!
MapWindow GIS is an open source geographic information system (GIS) that includes a set of vector and raster data visualization and analysis components as well as an end-user Windows GUI which can be extended through plug-ins. www.MapWindow.org.
Punt is a Open Source multi-language desktop application that allows the user to view the terrain of any world in 3D. Using open standards Punt can make use of data from the Internet combined with local data in common GIS-compatible formats.