The GIS stack,
mapped.

ArcGIS

Esri's comprehensive GIS platform for mapping, spatial analysis, and data management.

Atlas

Modern collaborative mapping platform for teams. Create, share, and analyze maps together.

Alternative to Google Maps Platform

CARTO

Cloud-based platform for spatial data science and location intelligence analytics.

Alternative to ArcGIS

CesiumJS

OSS

Open-source JavaScript library for world-class 3D globes and maps with WebGL.

Alternative to Google Earth

deck.gl

OSS

WebGL-powered framework for visual exploratory data analysis of large datasets.

Felt

Collaborative web-based mapping platform. Create beautiful maps together in your browser.

Alternative to ArcGIS, Google Maps Platform

Fiona

OSS

Pythonic file I/O for geospatial vector data, wrapping GDAL/OGR.

Leaflet

OSS

Leading open-source JavaScript library for mobile-friendly interactive maps. Simple and lightweight.

Alternative to Google Maps Platform, Bing Maps, Mapbox

kepler.gl

OSS

Powerful open-source geospatial analysis tool for large-scale datasets. Built by Uber.

MapLibre GL JS

OSS

Open-source TypeScript library for publishing maps on your website. Fast vector tile rendering.

Alternative to Mapbox, Google Maps Platform, Bing Maps

GraphHopper

OSS

Fast and memory-efficient routing engine for OpenStreetMap with many vehicle profiles.

Alternative to HERE Technologies, TomTom, Google Maps Platform

H3

OSS

Uber's hexagonal hierarchical geospatial indexing system for efficient spatial analysis.

GDAL

OSS

Translator library for raster and vector geospatial data formats. The Swiss Army knife of GIS.

GeoPandas

OSS

Python library extending pandas to allow spatial operations on geometric types.

Alternative to ArcGIS

GeoServer

OSS

Open-source server for sharing geospatial data. Supports WMS, WFS, WCS, and more.

Alternative to ArcGIS, Mapbox

FlatGeobuf

OSS

Binary geospatial vector format with fast streaming via HTTP range requests.

GeoDjango

OSS

Django's geographic web framework for spatial models, queries, and GIS web apps.

GeoNode

OSS

Open-source web platform for managing, publishing, and sharing geospatial data.

Alternative to ArcGIS

GEOS

OSS

C/C++ computational geometry library powering PostGIS, Shapely and QGIS.

geotiff.js

OSS

Browser and Node.js library for parsing GeoTIFF files for visualization and analysis.

GRASS GIS

OSS

Free, open-source GIS software for geospatial data management, analysis, and visualization.

Alternative to ArcGIS

HERE

Location platform with mapping, routing, and location services for enterprise applications.

Imposm

OSS

Fast OpenStreetMap importer that writes PostGIS databases.

JSTS

OSS

JavaScript port of the JTS topology suite for 2D spatial predicates and operations.

Leaflet-Geoman

OSS

Leaflet plugin for drawing, editing, measuring, and managing geometry layers.

libpostal

OSS

C library for parsing and normalizing international street addresses with statistical NLP.

Mapbox

Maps and location platform for developers. Includes GL JS, Studio, and navigation APIs.

Mapbox GL Draw

OSS

Drawing tools plugin for MapLibre/Mapbox GL maps — points, lines, polygons.

MapLibre-Geoman

OSS

MapLibre plugin for drawing, measuring, and editing geometry layers in web maps.

MapServer

OSS

Open-source platform for publishing spatial data and interactive maps to the web.

Alternative to ArcGIS

mapshaper

OSS

Editor for Shapefile, GeoJSON and TopoJSON — simplify, clip and convert in the browser.

maptalks.js

OSS

Extensible JavaScript library for integrated 2D and 3D mapping.

MapTiler

Map hosting platform with beautiful styles, vector tiles, and easy integration.

Alternative to Mapbox, Google Maps Platform

Martin

OSS

Blazing fast and lightweight PostGIS, MBtiles and PMtiles tile server written in Rust.

Alternative to Mapbox

morecantile

OSS

Python library for constructing and using OGC tile matrix sets beyond Web Mercator.

MySQL Spatial

OSS

Spatial types, indexes and functions built into MySQL and MariaDB.

Nominatim

OSS

Open-source geocoding with OpenStreetMap data. Powers search on openstreetmap.org.

Alternative to Google Maps Platform, HERE Technologies

OpenDroneMap

OSS

Open-source CLI for turning aerial imagery into orthophotos, point clouds, DEMs, and 3D models.

OpenGlobus

OSS

WebGL engine for interactive 3D globes, terrain, and geospatial data at planetary scale.

Alternative to Google Earth

QGIS

OSS

Free and open-source cross-platform desktop GIS. Create, edit, visualize, analyze and publish geospatial data.

Alternative to ArcGIS, MapInfo Pro

OpenLayers

OSS

High-performance, feature-packed library for creating interactive maps on the web.

Alternative to Google Maps Platform, Bing Maps

OpenMapTiles

OSS

Open vector tile schema and Docker toolchain for self-hosted OSM basemaps.

Alternative to Mapbox, Google Maps Platform

openrouteservice

OSS

Open-source routing API with directions, isochrones, and matrix services built on OpenStreetMap data.

Alternative to Google Maps Platform, HERE Technologies, TomTom

Turf.js

OSS

Advanced geospatial analysis library for browsers and Node.js. Modular and fast.

Alternative to ArcGIS

OSRM

OSS

High-performance routing engine designed to run on OpenStreetMap data.

Alternative to HERE Technologies, TomTom, Google Maps Platform

Valhalla

OSS

Open-source routing engine with turn-by-turn navigation and isochrone generation.

Alternative to HERE Technologies, TomTom, Google Maps Platform

Shapely

OSS

Python library for manipulation and analysis of planar geometric objects.

Protomaps

OSS

Free, open-source map of the world deployable as a single static file (PMTiles).

Alternative to Mapbox, Google Maps Platform

Rasterio

OSS

Python library for reading and writing geospatial raster datasets using GDAL.

Alternative to Google Earth Engine

PostGIS

OSS

Spatial database extender for PostgreSQL. Adds support for geographic objects and spatial queries.

Alternative to ArcGIS

Planetiler

OSS

Fast tool for generating planet-scale vector tiles from OpenStreetMap in hours, not days.

Alternative to Mapbox

osm2pgsql

OSS

Import OpenStreetMap data into a PostgreSQL/PostGIS database for map rendering and analysis.

Osmium

OSS

Fast and flexible C++ library and command-line tool for working with OpenStreetMap data.

OSMnx

OSS

Python package for downloading, modeling, analyzing, and visualizing OpenStreetMap networks.

PDAL

OSS

Point cloud data abstraction library and CLI for translating, filtering, and processing LiDAR.

Pelias

OSS

Open-source geocoder using data from OpenStreetMap, OpenAddresses, and more.

Alternative to Google Maps Platform, HERE Technologies

pgRouting

OSS

Routing algorithms — Dijkstra, A*, TSP, VRP — as SQL functions inside PostGIS.

Alternative to HERE Technologies, TomTom

Photon

OSS

Low-latency forward and reverse geocoder for OpenStreetMap data.

Alternative to Google Maps Platform, HERE Technologies

PROJ

OSS

Generic coordinate transformation library for converting between different CRS.

Proj4js

OSS

JavaScript library for reprojecting coordinates between coordinate systems, including datum transformations.

pygeoapi

OSS

Python server implementation of the OGC API suite for publishing geospatial data.

react-map-gl

OSS

React components for building map apps with MapLibre GL JS or Mapbox GL JS.

rio-cogeo

OSS

Rasterio plugin for creating and validating Cloud-Optimized GeoTIFFs.

S2 Geometry

OSS

Google's spherical geometry library with hierarchical cell indexing.

Spatial extension for SQLite — a full spatial database in a single file.

Stadia Maps

Hosted basemaps, geocoding and routing APIs built on open data.

Alternative to Mapbox, Google Maps Platform

Supercluster

OSS

Fast JavaScript library for clustering large GeoJSON point datasets in browsers and Node.js.

Tegola

OSS

Fast Mapbox Vector Tile server written in Go with PostGIS and GeoPackage support.

Alternative to Mapbox

tilemaker

OSS

Build vector tiles from OpenStreetMap with a single command — no database needed.

Tippecanoe

OSS

Build vector tilesets from large collections of GeoJSON features. Essential for tile generation.

Alternative to Mapbox

TiTiler

OSS

Dynamic raster tile server for Cloud-Optimized GeoTIFFs and STAC items.

TomTom

Commercial location APIs for routing, traffic, geocoding and maps.

Xarray

OSS

N-dimensional labeled arrays in Python — the standard for netCDF and raster cubes.