Designing maps might seem easy, but it is not, especially when many tools require certain levels of technical knowledge. A good map design can promote your presentation, website, and increase your work exposure.

Data scientists, business analysts, marketeers, advertisers, and many other professions require map design in their daily work. Some may use free tools and web service like Google Maps, and OpenStreetMap and others.

However, if you are looking for a multi purpose data visualization libraries and frameworks, we got you covered in the following post: 30+ Data Visualization Libraries, Frameworks and Apps, Mastering Data Presentation.

Here, in this article we offer you the best open-source free map design solutions out there.

1- Tilemill

TileMill is an amazing open-source desktop application that helps you design a highly sophisticated stylish and reactive maps in no time.

You can customize your map using CSS or Geography Class (MMS) file, extend your project with plugins, and add more interactive layers to your map.

Tilemill allows you to export your maps in several formats as PNG, PDF, and more.

Design Beautiful Maps Easily with TileMill
TileMill is a modern map design studio powered by Node.js and Mapnik.

2- OpenGlobus

OpenGlobus is an open-source JavaScript library for building an interactive 3D maps and plants. It supports map tiles, imagery, and vector data.

OpenGlobus uses OpenStreetMaps (OSM) and it works with m any JavaScript frameworks.

Openglobus is a JavaScript/WebGL library for interactive 3D maps and planets
Web site created using create-react-app

3- Leaflet.js

Some may consider Leaflet.js as the right open-source Google Maps alternative. It is an open-source mobile-friendly responsive map library that supports touch, tiles, and plugins.

Leaflet — an open-source JavaScript library for interactive maps
Leaflet is a modern, lightweight open-source JavaScript library for mobile-friendly interactive maps.
GitHub - Leaflet/Leaflet: 🍃 JavaScript library for mobile-friendly interactive maps 🇺🇦
🍃 JavaScript library for mobile-friendly interactive maps 🇺🇦 - GitHub - Leaflet/Leaflet: 🍃 JavaScript library for mobile-friendly interactive maps 🇺🇦

4- Kepler.gl

Kepler.gl is a powerful open source geospatial analysis tool for large-scale data sets. It is an ideal solution for created rich and heavy map visualization. Kepler.gl has a dozen of plugins and a strong community of developers who support the project.

Large-scale WebGL-powered Geospatial Data Visualization Tool
Kepler.gl is a powerful web-based geospatial data analysis tool. Built on a high performance rendering engine and designed for large-scale data sets.
GitHub - keplergl/kepler.gl: Kepler.gl is a powerful open source geospatial analysis tool for large-scale data sets.
Kepler.gl is a powerful open source geospatial analysis tool for large-scale data sets. - GitHub - keplergl/kepler.gl: Kepler.gl is a powerful open source geospatial analysis tool for large-scale d…

5- CesiumJS

CesiumJS is an open source JavaScript library for creating world-class 3D globes and maps with the best possible performance, precision, visual quality, and ease of use. Developers across industries, from aerospace to smart cities to drones, use CesiumJS to create interactive web apps for sharing dynamic geospatial data.

It works on all modern browsers, and with all popular JavaScript frameworks.

CesiumJS: A 3D Globe Visualization Library
CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin. It uses WebGL for hardware-accelerated graphics, and is cross-platform, cross-browser, and tuned for dynamic-data visualization. CesiumJS can stream 3D content such as terrain, imagery, and 3D Til…
CesiumJS
CesiumJS is an open source JavaScript library for creating world-class virtual 3D globes. For more than 10 years, Cesium provides the best-in-class performance, precision, visual quality, and ease of use. Used by developers across industries, from aerospace to smart cities to drones, to create inter…

6- OpenLayers

OpenLayers makes it easy to put a dynamic map in any web page. It can display map tiles, vector data and markers loaded from any source. OpenLayers has been developed to further the use of geographic information of all kinds. It is completely free, Open Source JavaScript, released under the 2-clause BSD License (also known as the FreeBSD).

OpenLayers - Welcome

7- The Turing Geo-visualisation Engine (TGVE)

The Turing Geovisualisation Engine (TGVE) is a web-based, interactive visual analytics tool for geospatial data analysis, built using R and JavaScript/React, that can be used as a complete server-client application or just as a front-end stand-alone application.

GitHub - tgve/tgvejs: Turing Geo-Visualisation Engine
Turing Geo-Visualisation Engine. Contribute to tgve/tgvejs development by creating an account on GitHub.

8- DynamoVis

DynamoVis is a data visualization software specifically targeted for spatiotemporal movement data. It is developed by Move Lab @ UC Santa Barbara and designed to be accessible and easily usable for scientists without extensive prior experience with programming, GIS software, or custom data visualization tools.

GitHub - move-ucsb/DynamoVis: An exploratory movement visualization tool
An exploratory movement visualization tool. Contribute to move-ucsb/DynamoVis development by creating an account on GitHub.

9- folium

folium builds on the data wrangling strengths of the Python ecosystem and the mapping strengths of the leaflet.js library. Manipulate your data in Python, then visualize it in on a Leaflet map via folium.

folium makes it easy to visualize data that’s been manipulated in Python on an interactive leaflet map. It enables both the binding of data to a map for choropleth visualizations and passing rich vector/raster/HTML visualizations as markers on the map.

GitHub - python-visualization/folium: Python Data. Leaflet.js Maps.
Python Data. Leaflet.js Maps. . Contribute to python-visualization/folium development by creating an account on GitHub.

10- OSMnx

OSMnx is a Python package that lets you download geospatial data from OpenStreetMap and model, project, visualize, and analyze real-world street networks and any other geospatial geometries.

You can download and model walkable, drivable, or bikeable urban networks with a single line of Python code then easily analyze and visualize them. You can just as easily download and work with other infrastructure types, amenities/points of interest, building footprints, elevation data, street bearings/orientations, and speed/travel time.

GitHub - gboeing/osmnx: Python for street networks. Download, model, analyze, and visualize street networks and other geospatial features from OpenStreetMap.
Python for street networks. Download, model, analyze, and visualize street networks and other geospatial features from OpenStreetMap. - GitHub - gboeing/osmnx: Python for street networks. Download,…

11- Worldmap.js

WorldMap.js is a JavaScript library based on D3.js to visualize Jason data or spreadsheets on a map by plotting graphs, markers, text, images, arcs and bubbles. It also has some basic GIS functionality such as loading and drawing objects in Geojson format.

The library is fully customizable allowing you to set almost all the styles of the map. You can customize the map style, the objects on the map and the animations by setting custom values into the Worldmap object. You can also choose which data you want to display by selecting specific columns or attributes in the table panel.

WorldMap.js: A javascript library for geographical and map visualizations based on D3.js

12- heatmap.js

heatmap.js is a lightweight, easy to use JavaScript library to help you visualize your three-dimensional data!

Dynamic Heatmaps for the Web
An easy to use, open source, data visualization library to help you create beautiful heatmaps for your projects. Get started in minutes!

13- jQuery Mapael

jQuery Mapael is a JavaScript library to render and manipulate dynamic vector maps. It is based on Raphael.js library. It renders a responsive map that you can zoom, add tooltips, dynamic events, and plots.

jQuery Mapael - Ease the build of pretty data visualizations on dynamic vector maps
jQuery Mapael is a jQuery plugin based on raphael.js that allows you to display dynamic vector maps.

14- Geocomplete

Geocomplete is an advanced jQuery plugin that wraps the Google Maps API's Geocoding and Places Autocomplete services. You simply provide an input that lets you search for locations with a nice autocomplete dropdown. Optionally add a container to show an interactive map and a form that will be populated with the address details.

Geocomplete - jQuery Geocoding and Places Autocomplete Plugin
An advanced jQuery plugin that wraps the Google Maps API’s Geocoding and Places Autocomplete services.
GitHub - ubilabs/geocomplete: jQuery Geocoding and Places Autocomplete Plugin
jQuery Geocoding and Places Autocomplete Plugin. Contribute to ubilabs/geocomplete development by creating an account on GitHub.

15- Kartograph

Kartograph is a feature-rich map design framework for JavaScript and Python. With it, you can create 3D maps, vector maps, heatmaps, and rich presentation in no time.

The JavaScript library works on all modern web browsers, and it is built on top of Raphael, and jQuery.

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16- D3.js

D3.js is a rich JavaScript library for building interactive data visualization on top of web technologies as HTML, SVG, and CSS.

The D3 stands for Data-Driven Documents. It can be easily integrated with other JavaScript frameworks as React, Vue, and Angular.

D3.js has a rich community of developers that support it by adding code samples, open-source libraries and more.

D3 by Observable | The JavaScript library for bespoke data visualization
The JavaScript library for bespoke data visualization
GitHub - d3/d3: Bring data to life with SVG, Canvas and HTML. :bar_chart::chart_with_upwards_trend::tada:
Bring data to life with SVG, Canvas and HTML. :bar_chart::chart_with_upwards_trend::tada: - GitHub - d3/d3: Bring data to life with SVG, Canvas and HTML. :bar_chart::chart_with_upwards_trend::tada:

17- DataMaps

Datamaps is intended to provide some data visualizations based on geographical data. It's SVG-based, can scale to any screen size, and includes everything inside 1 script file. It heavily relies on the amazing D3.js library.

DataMaps
A jQuery plugin for geographical map data visualizations using d3.js, SVG.
GitHub - markmarkoh/datamaps: Customizable SVG map visualizations for the web in a single Javascript file using D3.js
Customizable SVG map visualizations for the web in a single Javascript file using D3.js - GitHub - markmarkoh/datamaps: Customizable SVG map visualizations for the web in a single Javascript file u…

18- Maplace.Js

Maplace.js helps you to embed Google Maps into your website, quickly create markers and controls menu for the locations on map.
It requires jQuery and Google Maps API v3, so you need to have both in your page.

Maplace.js - A Google Maps javascript plugin for jQuery.
Maplace.js helps you to embed Google Maps into your website, creating markers, controls menu, circles, polyline for geolocations on map.

19- Stately

Stately is a symbol font that makes is easy to create a map of the United States using only HTML and CSS. Each state can be styled independently with CSS for making simple visualizations. And since it's a font, it scales bigger and smaller while staying sharp as a tack.

GitHub - mobomo/stately
Contribute to mobomo/stately development by creating an account on GitHub.

20- Marble

Marble is a free open source globe and virtual atlas for Linux, Windows, , macOS and, mobile (Android, and iOS).

Marble allows you to explore cities, countries, historical maps, plants, and more. It also comes with a rich search options that searches for everything, and works in offline mode for desktop installations.

Marble - find your way and explore the world
Education / Marble · GitLab
Virtual Globe and World Atlas that you can use to learn more about the Earth

21- React Simple Maps

React Simple Maps is an SVG maps library for React, that uses d3-geo library and topojson. It comes with a developer-friendly documentation, a dozen of examples, and a flexible API.

Build A Map-rich Apps with React and React Simple Maps
Create beautiful SVG maps in react with d3-geo and topojson using a declarative api.

If you know of any other open-source free map visualization tool that we did not mention here, let us know.