Our list of recommended resources and tools to help you become a better web cartographer:
- Mapbox GL JS
This is probably the most popular digital maps API.
Mapshaper is a web app that helps you manipulate map data.
QGIS is a free and open source application for geographic information systems.
- OSM Boundaries Map
An interactive tool that lets you download polygons for political boundaries around the world. Powered by OpenStreetMap.