This product is listed as “Self-hosted & Open Source”, which is why it does not necessarily have to be European.
Nextcloud Deck is a simple open source Kanban project management application for the Nextcloud suite. It allows organizing tasks together with other users, who can comment, label tasks and attach files.
Taiga is an open-source project management software from Spain. Their features include: multiple different dashboards, Kanban boards, an issue tracker, and project timelines. Project members can be assigned roles, permissions, and work-in-progress limits. Taiga can be integrated into other services, and you can build your own integrations with their API. They offer hosted solutions, but they can also be self-hosted.
OpenProject is a project management software from Germany. They are open-source and can be self-hosted, but also offer on cloud solutions. They are built around tasks which can be viewed in different ways, for example in a Kanban board, a timeline or in a calendar. These tasks can be assigned to people and created by everyone. OpenProject can be integrated into other services, and you can build your own integrations with their API.
