SIG/GISUp one level
- MapServer is an OpenSource development environment for building spatially enabled Internet applications
- GRASS GIS (Geographic Resources Analysis Support System) is an open source, Free Software Geographical Information System (GIS) with raster, topological vector, image processing, and graphics production functionality that operates on various platforms through a graphical user interface and shell in X-Window.
- The GeoServer project is a full transactional Java (J2EE) implementation of the OpenGIS Consortium's Web Feature Server (WFS) specification with a completely integrated Web Map Server (WMS). Users who would like to access and modify their geographic data over the Internet using flexible, industry-approved standards should take a look at GeoServer or one of the existing commercial Web Feature Servers. It is built as a thin layer on top of the excellent GeoTools2 GIS toolkit, and includes a STRUTs-based Web administration interface for easy configuration.