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QGIS - QGIS is a desktop geographic information system, or GIS.
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GRASS GIS - GRASS GIS is a free Geographic Information System (GIS) software used for geospatial data management and analysis, image processing, graphics/maps production, spatial modeling, and visualization.
Open Nautical Charts - Open Nautical Charts offers free seacharts for everybody.
ArcGIS - ArcGIS software is a data analysis, cloud-based mapping platform that allows users to customize maps and see real-time data ranging from logistics support to overall mapping analysis.
Ugrib - Our freeware application Ugrib allows instant and fully customizable access to global weather data.