Euro-Office – Your sovereign office (github.com)

Euro-Office is an open-source, AGPL-based web component for real-time collaborative editing of office documents (e.g., DOCX, XLSX, PPTX, ODF formats, and PDF). The project is positioned as an embeddable “sovereign office” editing layer that relies on partner platforms for storage, permissions, and sharing. Euro-Office was created by European contributors after they said collaboration with the upstream ONLYOFFICE project was difficult, and it is currently setting up a consensus-driven governance model while inviting public contributions.