OpenStreetMap
OpenStreetMap Foundation · GIS & mapping
Collaboratively edited world map database released under the ODbL, with planet files, an editing API and derived tiles and extracts
ODbL-1.0FreeSelf-hostedNov 2, 2026
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Overpass API
Roland Olbricht and the OpenStreetMap community · GIS & mapping
Read-only query service for OpenStreetMap data using the Overpass QL language, available on public instances or self-hosted
AGPL-3.0-onlyFreeOpen sourceSelf-hostedNov 2, 2026
PostGIS
PostGIS Project Steering Committee (OSGeo) · GIS & mapping
Spatial extension for PostgreSQL adding geometry, geography and raster types with indexing and hundreds of SQL functions
GPL-2.0-or-laterOpen sourceFreeSelf-hostedNov 2, 2026
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