Rpanion Electronics provides the open-source Rpanion-server software as an easy method to configure a companion computer. It is a web-based GUI that allows the user to configure network settings, telemetry routing and video streaming.
Rpanion-server is designed to complement the Pi-Connect boards. The Pi-Connect is not required to run the software, though.
For further information and downloads for Rpanion-server, see the documentation site.