[pramsey]

PostGIS is now basically the "industry standard", so most third party tools work with it, even Esri! Here's some open source parts:

Desktop: https://qgis.org

Middleware: https://mapserver.org, https://geoserver.org, https://mapnik.org, https://github.com/crunchydata/pg_tileserv, https://github.com/crunchydata/pg_featureserv

Web UI: https://openlayers.org, https://leaflet.org, https://www.mapbox.com/mapbox-gljs

[jerrysievert]

much to some grumpiness from the home office, we even used postgis at esri's Portland R&D center.

it was a pleasure to use, and pramsey is definitely a stand up person.