CONSORTIA/INSTITUTIONS
MAPWINDOW
MapWindow is free to use and redistribute to your clients and other end users. Unlike other free tools, MapWindow is more than just a data viewer, it is an extensible geographic information system. This means that you can write plug-ins to add additional functionality (models, special viewers, hot-link handlers, data editors, etc.) and pass these along to any number of your clients and end users. Summary Provided By: http://www.mapwindow.org/index.php