egroupware

It provides a self‑hosted suite of collaboration tools that includes a calendar, address book, notepad, project‑management features, CRM, knowledge‑base wiki, and a content‑management system. The core applications are delivered as open‑source GPL‑2.0 software and can be installed through Linux package managers or Docker containers, with optional developer setups that include additional services such as a push server.

The platform targets organisations that need an on‑premises or self‑managed online office while retaining full control over data. Users can schedule appointments, store contacts, track tasks, manage projects, and handle customer relationships, all within a single web interface. Integrated modules for email, chat, video meetings, file handling, and e‑invoicing extend the basic functionality to a comprehensive digital workplace.

Distinctive aspects include a German‑origin development and support model, compliance‑focused e‑invoice generation for EU standards, and a modular architecture that allows extensions like CTI telephony, remote‑desktop access, and AI‑assisted search. The system is maintained with continuous integration testing and static analysis, and releases are rolled out regularly.