CoopComm is a web application for inter-municipal cooperation, aimed at communities of municipalities, joint authorities and other local governments. They use it to pool staff and equipment in one tool: equipment inventory with loan tracking and a map, intervention requests from members that field agents carry out, a workflow with notifications at each status change, QR codes, a budget dashboard and messaging between managers and agents. Each intervention moves through the steps new, accepted, in progress, completed, validated and archived.
CoopComm is published by Aïkku, a French SAS with offices in Puteaux (La Défense) and Montfermeil. The source code is public on GitHub under the GNU GPL version 3, an open-source licence, and the README describes installation with Docker on a Linux server. If you run it yourself, the data stays on your own infrastructure. The sources do not say whether Aïkku also offers a hosted version or where it would be hosted; a demo is available. Aïkku itself describes the solution as sovereign.