Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.
Stalwart is an open-core mail server solution with JMAP, IMAP4, POP3, and SMTP support and a wide range of modern features. It is written in Rust and designed to be secure, fast, robust and scalable.
United Kingdom

With Memotoo, sync all you want !
Sync and share your personal datas (bookmarks, address book, calendar, files, ...) with Memotoo.com to find them from any computer connected to Internet.
- Dont lose your data: if you lose or change your mobile phone, ...
- Access your data onl.
France
EU



All you need in a team collaboration tool dedicated to small efficient teams. Chat, notes, drive, online collaborative edition, calendars, news, spaces, notifications...
Cost / License
- Free
- Open Source
Application typeApplication types
Since
- Since 2018
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
Switzerland



SOGo is groupware server with a focus on scalability and open standards.
SOGo provides a rich AJAX-based Web interface and supports multiple native clients through the use of standard protocols such as CalDAV, CardDAV and GroupDAV.Share your calendars, address books and mails in.
Canada



Enterprise-level free suite offers IMAP email, calendar, contacts, tasks, notes, file manager, wiki, syncing, multi-language support, and mobile access.


View all your Google, Outlook, iCloud, and Office365 calendars in one place. Manage events, birthdays, and appointments with seamless integration.
Netherlands
EU



OwnDrive is a security and privacy oriented cloud storage service that gives access to people’s data anywhere, anytime and from any device. OwnDrive makes storing, syncing and sharing of data easy. Our users have the ability to store, sync and share files, contacts, calendars...
Cost / License
- Freemium
- Proprietary
Application typeApplication types
Since
- Since 2013
Germany
EU



A simple task manager app, allowing you to categorise your todo list by urgency, state, timeframe etc.
Germany
EU



Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
Netherlands
EU


🗓 A modern, simple, feature-packed, fully translatable admin interface for sabre/dav based on Symfony 7 and Bootstrap.
France
EU



Calcurse is a calendar and scheduling application for the command line. It helps keep track of events, appointments and everyday tasks. A configurable notification system reminds user of upcoming deadlines, the curses based interface can be customized to suit user needs and a...


+3
The software offers features for easy task management including support for multiple task lists, task modification, and color-coding for easy identification. It synchronizes tasks with Nextcloud or other CalDAV providers for cross-platform updates.


Axigen provides a multi-tenant, fully integrated, multi-platform, all-in-one email, calendaring and collaboration messaging solution. It grants extensive branding options and is localized in over 29 languages (including right-to-left writing mode).
Italy
EU


+1
BORG is a combination calendar and task tracking system. The calendar supports all sorts of appointments and also a simple todo list. The calendar functionality is similar to that of other PIMs, such as Microsoft Outlook, Mozilla Calendar, Palm Desktop, Yahoo Calendar, etc...
United States



grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
Germany
EU



eclipso Mail is an complete and secure e-mail system from Germany with many useful and practical functions: Antispam, unlimited email folders, webmail, mobile app, Postoffice, fax and cloud storage. and many more.
Germany
EU


+1


+1


+2
OwnCube is an OwnCloud provider. OwnCube offers a FREE and a Premium Service, where all your photos, videos, documents, music, projects are always available and can be shared with anyone at any time. Not only are your files accessible and easy-to-handle on OwnCube, but you can...
GNOME Calendar is a simple and beautiful calendar application designed to perfectly fit the GNOME desktop. By reusing the components which the GNOME desktop is build on, Calendar nicely integrates with the GNOME ecosystem.
United States


+5
Free Outlook Plugin, which synchronizes events, tasks and contacts between Outlook and Google, SOGo, Horde or any other CalDAV or CardDAV server. Supported Outlook versions are 2016, 2013, 2010 and 2007.
Austria
EU
































































