PostGIS.

Spatial extension for PostgreSQL for storing and processing geographic data

Facts

52°North
German research institute that develops open-source geospatial software
DE · open-source
↗
Camptocamp
Swiss company specialised in open-source GIS and geospatial web applications
CH · open-source
↗
GRASS GIS
Open-source GIS for advanced raster, vector and spatial analyses
IT · open-source
↗
GeoServer
Open-source server for sharing geospatial data via OGC standards such as WMS and WFS
IT · open-source
↗
OpenLayers
Open-source JavaScript library for interactive maps in the web browser
DE · open-source
↗
QGIS
Powerful open-source GIS for editing, analysing and publishing spatial data
CH · open-source
↗
WhereGroup
German company behind Mapbender, specialised in spatial data infrastructure
DE · open-source
↗
lat/lon
German company that develops the deegree open-source web services for INSPIRE directives
DE · open-source
↗