Alternatives to Kolab Community for all platforms with any license

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  • Google Calendar icon

    Google Calendar

    With Google Calendar, its easy to keep track of all your lifes important events in one place. You can add events and send invitations effortlessly, share your schedule with friends and family, and search for events you might enjoy.

    Free Web / Cloud Android iPhone Chrome OS Android Tablet iPad ... Sunbird Chrome

  • Roundcube icon

    Roundcube

    Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message...

    Open Source Self-Hosted PHP

  • G Suite icon

    G Suite

    G Suite (formerly Google Apps for Work) is Google's encompassing selection of cloud apps for business, including customizable products under custom domain names. It features traditional office tools through Google Docs as well as...

    Commercial Mac Windows Linux Web / Cloud Chrome OS

    No features added Add a feature
  • Zimbra Collaboration Suite icon

    Zimbra Collaboration Suite

    Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically...

    Freemium Linux Web / Cloud

    No features added Add a feature
  • OX Open-Xchange icon

    OX Open-Xchange

    Open-Xchange Server 6 is the most advanced Linux based Groupware solution f. Open-Xchange Server 6 is superior in the following areas: • Open-Xchange Server 6 offers most comprehensive Groupware functionality based on modern user...

    Open Source Linux Web / Cloud

  • Dials icon

    Dials

    Dials' unique clock-based view of your day is easier and faster to view than the standard “list view” format other mobile calendars use. Dials' “one hand, one thumb” entry and edit of events also makes Dials the easiest and...

    Free iPhone

  • Microsoft Exchange Server icon

    Microsoft Exchange Server

    Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft. It is part of the Microsoft Servers line of server products and is widely used by enterprises using Microsoft infrastructure...

    Commercial Windows Web / Cloud

    No features added Add a feature
  • CalenGoo icon

    CalenGoo

    CalenGoo gives you a fast and easy way to access and change your Google Calendar (or Google Apps Calendar) with your Android device. It can either work with the built-in calendar or it can sync directly with Google. Feature...

    Commercial Android iPhone Android Tablet iPad Android Wear

    No features added Add a feature
  • Simple Calendar icon

    Simple Calendar

    A simple calendar with events (optional recurring and reminders), week numbers and a customizable widget. It provides a yearly, monthly, daily view. It's fully opensource without ads, provides a dark theme too.

    Open Source Android Android Tablet

  • Zoho Calendar icon

    Zoho Calendar

    Zoho Calendar is a free online calendar application that helps you to track your appointments and meeting schedule, send invitation and track RSVP's, share and publicize your calendars. You can aslo access your Zoho Calendar from...

    Free Web / Cloud

    No features added Add a feature
  • eGroupWare icon

    eGroupWare

    Egroupware is a web based software for team collaboration, central data management and CRM: email client, online calendar, contact and task management, project and file management, trouble ticket system, synchronization.

    Open Source Linux Web / Cloud

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  • Atmail Email Server icon

    Atmail Email Server

    Atmail webmail system offers a webmail client, email server platform and mailserver appliance for Linux, Unix and Windows. Features: Webmail Calendar Addressbook IMAP, POP or Exchange WebSync SMTP/POP3/IMAP server Explore the...

    Commercial Linux Web / Cloud

  • OBM icon

    OBM

    OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

    Open Source Mac Windows Linux

    No features added Add a feature
  • DigiCal icon

    DigiCal

    BEAUTIFULLY DESIGNED DigiCal’s diary planner and organizer provides a clear and beautiful overview for your events and appointments. • Conveniently switch between 7 calendar views (day, week, week agenda, month calendar, text month...

    Free Android Android Tablet

    No features added Add a feature
  • atmail icon

    atmail

    Atmail allows you to choose between on-premises or cloud deployment. Features include email, contact, calendar, task, storage, synchronisation and provisioning. It's extensible through a RESTful API and allows easy rebranding...

    Commercial Mac Windows Linux Android iPhone Android Tablet ... iPad

    No features added Add a feature
  • Citadel

    Is a collaboration suite (messaging and groupware). It is designed to run on open source operating systems such as Linux or BSD. In order to modernize the Citadel platform for the Internet, the Citadel/UX developers added...

    Open Source Linux Web / Cloud

    No features added Add a feature
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  • WikiSuite icon

    WikiSuite

    The most comprehensive and integrated Free / Libre / Open Source software suite ever developed.

    Open Source Linux Self-Hosted

    No features added Add a feature
  • Kopano icon

    Kopano

    Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface. Kopano helps you work smarter with people within and outside your organization. A single interface gives you email, contacts...

    Commercial Mac Windows Linux Web / Cloud Android iPhone ... Android Tablet Windows Phone iPad Microsoft Office Outlook

  • Contactoffice icon

    Contactoffice

    Virtual Office, Online Office, Digital Learning Space, Online Groupware - ContactOffice, Keep a virtual office on the web. Share documents, contacts, calendar, tasks, ... with clients, students, suppliers, friends or family.

    Freemium Web / Cloud

  • KeepTime icon

    KeepTime

    A free, smart calendar with wait time reports. Wait less, do more. KeepTime is your personal, smart calendar that helps you outsmart waiting lines, predict traffic and adapt your schedule to always be on time.

    Free Web / Cloud Android

  • Remind icon

    Remind

    A sophisticated calendar and alarm program. It includes the following features: A sophisticated scripting language and intelligent handling of exceptions and holidays. Plain-text, PostScript and HTML output. Timed reminders and...

    Open Source Linux

  • Xeams icon

    Xeams

    Xeams is a secure & powerful mail server for Windows, Linux, Solaris, MacOSX and other flavors or UNIX, which supports SMTP, POP3, and IMAP. It includes a powerful spam/junk filtering engine that elimates up to 99% of junk email...

    Free Personal Mac Windows Linux BSD

    No features added Add a feature
  • iMail icon

    iMail

    Fast, safe, heavy mail solution. Web-client access, LAN or WAN self-hosted server, maintenance-free design. No Windows server and database server required, unlimited mail accounts, storage, attachment size, custom logo. Free for...

    Free Windows Self-Hosted

    No features added Add a feature

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