GeoServer

As the reference implementation for OGC WFS and WCS, and certified for WMS, GeoServer ensures maximum interoperability and compliance with geospatial web standards, as highlighted in the README.

Supports key formats like GeoPackage, GeoTIFF, GML, and Shapefile, enabling versatile data publishing from various sources, as noted in the standards section.

Developed and supported by a global community, it benefits from continuous updates, extensive documentation, and active issue tracking via JIRA, as mentioned in the community support details.

Designed explicitly for interoperability using open standards, it facilitates seamless integration with other geospatial tools, forming a core part of the Geospatial Web.