PostgreSQL

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The World’s Most Advanced Open Source Relational Database

pgRouting
pgRouting extends the PostGIS / PostgreSQL geospatial database to provide geospatial routing functionality.
pg_arcgis
Reach out to ArcGIS web service from PostgreSQL or Greenplum
pg_osm
Reach out to OpenStreetMap web service from PostgreSQL or Greenplum
Installing PostgreSQL 12 on Raspbian Buster using Docker
psycopg
Psycopg is the most popular PostgreSQL adapter for the [[Python programming language|r.tech.software.python]]. Its core is a complete implementation of the Python DB API 2.0 specifications. Several extensions allow access to many of the features offered by PostgreSQL.
EDB - commercial support for PostgreSQL
Software, services, and support for teams who need to do more and go faster with PostgreSQL.