The GIS stack,
mapped.

Apache ECharts

OSS

JavaScript visualization library with interactive charts, maps, and geographic data components.

AntV L7

OSS

WebGL library for large-scale 2D and 3D geospatial visualization in web applications.

Apache Sedona

OSS

Distributed spatial processing engine for large-scale vector and raster data with spatial SQL.

ArcGIS

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

Atlas

Browser-based GIS with an AI assistant for building maps, spatial analyses, and team workflows.

Alternative to Google Maps Platform

CARTO

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

Alternative to ArcGIS

Cartopy

OSS

Python library for map projections and cartographic visualization built on matplotlib.

CesiumJS

OSS

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

Alternative to Google Earth

D3.js

OSS

JavaScript library for data-driven documents, including the d3-geo map projections.

deck.gl

OSS

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

deegree

OSS

Java framework for spatial data infrastructures and OGC web services.

Alternative to ArcGIS

geo

OSS

Rust crate of geospatial primitives, algorithms and CRS utilities.

GeoDjango

OSS

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

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

geopy

OSS

Python client library for forward and reverse geocoding services.

GeoServer

OSS

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

Alternative to ArcGIS, Mapbox

geemap

OSS

Python package for interactive geospatial analysis and visualization with Google Earth Engine.

GeoTools

OSS

Open-source Java GIS toolkit for geospatial formats, standards, and services.

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.

eo-learn

OSS

Python framework for modular Earth-observation processing workflows.

Fiona

OSS

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

FlatGeobuf

OSS

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

Entwine

OSS

Lossless point-cloud organization library and CLI for building spatially indexed EPT datasets.

EODAG

OSS

Unified Python API and CLI for searching and downloading Earth observation products.

Felt

Collaborative browser-based GIS for building maps from live data, with spatial SQL and AI.

Alternative to ArcGIS, Google Maps Platform

gdal3.js

OSS

WebAssembly build of GDAL and OGR for geospatial processing in browsers and Node.js.

gdalcubes

OSS

R package and C++ library for building and processing Earth observation data cubes.

geoblaze

OSS

Pure-JavaScript raster processing engine for GeoTIFFs in the browser and Node.js.

GeoDa

OSS

Desktop application for exploratory spatial data analysis and spatial econometrics.

Alternative to ArcGIS

geojson-vt

OSS

Slices GeoJSON into vector tiles on the fly in the browser, for rendering without a tile server.

GeoMesa

OSS

Distributed spatio-temporal storage and query suite for geospatial data.

GeoNetwork

OSS

Catalog application for publishing and searching spatial data and service metadata.

geotiff.js

OSS

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

GeoTrellis

OSS

Scala library for raster and vector geospatial processing, with Spark and distributed stores.

Library that adds geospatial and temporal indexing to distributed key/value stores.

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

GeoWebCache

OSS

Java tile cache for accelerating WMS, WMTS, and other map tile services.

Google Earth Engine

Planetary-scale cloud platform for satellite imagery analysis and geospatial data processing.

Leaflet

OSS

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

Alternative to Google Maps Platform, Bing Maps, Mapbox

MySQL Spatial

OSS

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

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.

libpostal

OSS

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

maptalks.js

OSS

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

mapshaper

OSS

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

Martin

OSS

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

Alternative to Mapbox

Mapnik

OSS

C++ cartographic rendering library for maps and tiles from geospatial data sources.

Mapv

OSS

Canvas-based JavaScript library for visualizing large geospatial point, line, and polygon datasets.

Leaflet-Geoman

OSS

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

MapLibre Native

OSS

Open-source native mapping engine for vector maps across mobile, desktop, and embedded platforms.

JSTS

OSS

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

iTowns

OSS

Three.js and WebGL framework for visualizing 2D and 3D geospatial data.

GRASS GIS

OSS

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

Alternative to ArcGIS

Imposm

OSS

Fast OpenStreetMap importer that writes PostGIS databases.

Koop

OSS

JavaScript toolkit for serving transformed geospatial data through web mapping APIs.

H2GIS

OSS

Spatial extension for H2 with OGC-compatible spatial SQL and analysis tools.

HERE

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

JTS Topology Suite

OSS

Java library of 2D spatial predicates and functions; the design behind GEOS and JSTS.

Lossless LAZ compression library and CLI for LiDAR point clouds, the de facto LAS standard.

MapServer

OSS

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

Alternative to ArcGIS

Mapbox GL Draw

OSS

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

morecantile

OSS

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

MapLibre-Geoman

OSS

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

Mapbender

OSS

Open-source WebGIS framework for building map applications without code.

Mapbox

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

MapTiler

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

Alternative to Mapbox, Google Maps Platform

MovingPandas

OSS

Python library for exploration and analysis of movement trajectories, built on GeoPandas.

NetTopologySuite

OSS

C# port of the JTS Topology Suite for vector geometry and spatial predicates.

QGIS

OSS

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

Alternative to ArcGIS, MapInfo Pro

QGIS Server

OSS

Open-source map server for publishing QGIS projects through OGC web services.

Alternative to ArcGIS

OpenLayers

OSS

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

Alternative to Google Maps Platform, Bing Maps

OSRM

OSS

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

Alternative to HERE Technologies, TomTom, Google Maps Platform

OpenDroneMap

OSS

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

OSMnx

OSS

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

Nominatim

OSS

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

Alternative to Google Maps Platform, HERE Technologies

Pelias

OSS

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

Alternative to Google Maps Platform, HERE Technologies

OpenMapTiles

OSS

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

Alternative to Mapbox, Google Maps Platform

Photon

OSS

Low-latency forward and reverse geocoder for OpenStreetMap data.

Alternative to Google Maps Platform, HERE Technologies

Protomaps

OSS

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

Alternative to Mapbox, Google Maps Platform

Proj4js

OSS

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

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

PROJ

OSS

Generic coordinate transformation library for converting between different CRS.

openrouteservice

OSS

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

Alternative to Google Maps Platform, HERE Technologies, TomTom

osm2pgsql

OSS

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

pgRouting

OSS

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

Alternative to HERE Technologies, TomTom

PDAL

OSS

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

overpass turbo

OSS

Web-based GUI for writing, testing, and visualizing OpenStreetMap Overpass queries.

pyproj

OSS

Python interface to PROJ for coordinate reference systems, transformations, and geodesy.

OpenGlobus

OSS

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

Alternative to Google Earth

pygeoapi

OSS

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

Osmium

OSS

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

OWSLib

OSS

Python toolkit for clients of OGC and OGC API web services.

Orfeo ToolBox

OSS

Open-source toolkit for large-scale optical, multispectral, and radar imagery processing.

Overpass API

OSS

Query engine that runs Overpass QL against the OpenStreetMap database over HTTP.

Overture Maps

OSS

Open, conflated global map data published as cloud-native GeoParquet by a Linux Foundation project.

Pandana

OSS

Fast network analysis in pandas: shortest paths and accessibility metrics.

pycsw

OSS

Python OGC API and CSW server for publishing and discovering geospatial metadata.

Python API for deck.gl, rendering GPU geospatial layers in Jupyter notebooks and Dash apps.

PySAL

OSS

Python Spatial Analysis Library: an ecosystem of packages for spatial statistics and econometrics.

pyshp

OSS

Pure-Python library for reading and writing ESRI Shapefiles without GDAL.

Turf.js

OSS

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

Alternative to ArcGIS

Tile38

OSS

In-memory geospatial database and geofencing server for indexed location data.

react-map-gl

OSS

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

Valhalla

OSS

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

Alternative to HERE Technologies, TomTom, Google Maps Platform

React Leaflet

React component bindings for building interactive Leaflet maps.

Shapely

OSS

Python library for manipulation and analysis of planar geometric objects.

Xarray

OSS

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

S2 Geometry

OSS

Google's spherical geometry library with hierarchical cell indexing.

Rasterio

OSS

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

Alternative to Google Earth Engine

Raster Vision

OSS

Open-source Python framework for deep learning on satellite and aerial imagery.

Summarize raster data over vector zones, with Python API and rio CLI subcommands.

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

Tegola

OSS

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

Alternative to Mapbox

TerriaJS

OSS

Library for building catalog-driven 2D and 3D web geospatial explorers.

Alternative to Google Earth

rio-tiler

OSS

Python library for generating map tiles and reading raster data from GDAL-supported sources.

rio-cogeo

OSS

Rasterio plugin for creating and validating Cloud-Optimized GeoTIFFs.

QuackOSM

OSS

Python library and CLI for reading OpenStreetMap PBF data into GeoParquet with DuckDB.

PyWPS

OSS

Python implementation of the OGC Web Processing Service standard.

Rtree

OSS

Python spatial index wrapping libspatialindex, with R-tree queries and bulk loading.

Simple Features for R

OSS

R package implementing the OGC Simple Features standard for spatial data in R.

Spatial4j

OSS

General purpose geospatial library for Java, a LocationTech project.

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.

Tangram

OSS

WebGL rendering engine for 2D and 3D vector maps, used as a Leaflet plugin.

three-geo

OSS

three.js library that turns GPS coordinates into textured 3D terrain meshes.

TiTiler

OSS

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

TomTom

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

Verde

OSS

Python library for processing and gridding spatial data, with a scikit-learn style API.

Vue for Cesium

OSS

Vue 3 component library for building 3D globe and terrain apps on CesiumJS.

Web WorldWind

OSS

NASA's WebGL globe engine for the browser, with terrain, imagery layers, and 3D shapes.

Alternative to Google Earth

WhiteboxTools

OSS

Open-source geospatial analysis platform with hundreds of raster, vector, and LiDAR tools.

Alternative to ArcGIS

xarray-spatial

OSS

Raster analysis functions for xarray, JIT-compiled with Numba and scalable with Dask.