SOGo
self-hosted, groupware

SOGo is a versatile platform for accessing calendaring and messaging data, offering various protocols such as CalDAV, CardDAV, GroupDAV, and ActiveSync. It ensures compatibility with native Outlook and provides a user-friendly web interface. With SOGo, users can seamlessly manage their calendars, contacts, and emails across different devices and platforms, enabling efficient collaboration and communication. Whether you prefer using desktop clients like Outlook or web-based interfaces, SOGo provides flexible and reliable access to your essential data.