GeoServer is described as 'The reference implementation of the Open Geospatial Consortiums WFS and WMS services, GeoServer is a full featured open source software server written in Java that allows users to query, visualize, combine, edit and publish spatial data over the web' and is a Map service in the travel & location category. There are more than 10 alternatives to GeoServer for a variety of platforms, including Web-based, Windows, Linux, Mac and Self-Hosted apps. The best GeoServer alternative is OpenFreeMap, which is both free and Open Source. Other great apps like GeoServer are VersaTiles, Mapbox Studio, Protomaps and Felt.