Mapbox Studio - A design platform for radically custom maps
PostGIS - Open source spatial database
Carto - The future of GIS? It’s Spatial Data Science. CARTO is the world’s leading Location Intelligence platform for Data Scientists, Developers and Analysts in Enterprise.
SpatiaLite - SpatiaLite is a spatial extension to SQLite, providing vector geodatabase functionality.
QGIS - QGIS is a desktop geographic information system, or GIS.
MapTiler Cloud - Online maps for web, mobile apps and desktop software.