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Microsoft Outlook Calendar

Calendar is a time-management web application by Microsoft.

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Verify Microsoft Outlook Calendar Edit

Top 8 Open-Source Alternatives to Microsoft Outlook Calendar

Simple Calendar Compass Calendar App Trello FullCalendar Calendar Lock PEA Rainloop Nextcloud Calendar Roundcube

Product categories

Appointment Scheduling Appointments and Scheduling Calendar Calendar And Scheduling Calendar App Email Email Clients Email Management Encryption Enterprise Communication Event Scheduling Productivity

Summary

The top open-source alternatives to Microsoft Outlook Calendar are Simple Calendar, Compass Calendar App, and Trello. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.
  1. Simple Calendar Landing Page
    Simple Calendar Landing Page
    1

    Simple Calendar

    A simple calendar with events (optional recurring and reminders), week numbers and a customizable...
    Pricing:
    • Open Source

    #Calendar #Appointments and Scheduling #Email 99 social mentions

  2. Compass Calendar App Landing Page
    Compass Calendar App Landing Page
    2

    Compass Calendar App

    Calm calendar for productive people
    Pricing:
    • Open Source

    #Calendar #Calendar And Scheduling #Calendar App

  3. Trello Landing Page
    Trello Landing Page
    3

    Trello

    Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
    Pricing:
    • Freemium
    • Free Trial
    • $12.5 / Monthly (Per user - Business Class)

    #Project Management #Task Management #Productivity 231 social mentions

  4. FullCalendar Landing Page
    FullCalendar Landing Page
    4

    FullCalendar

    FullCalendar is an open-source JavaScript event calendar.
    Pricing:
    • Open Source

    #Appointments and Scheduling #Calendar #Appointment Scheduling 13 social mentions

  5. Calendar Lock PEA Landing Page
    Calendar Lock PEA Landing Page
    5

    Calendar Lock PEA

    Calendar Lock PEA is an encrypted desktop calendar with a day, week and month view. The shown calendars are never stored unencrypted on your disk, but exist only in the RAM. Platform-independent, Open Source, no installation or registration required.
    Pricing:
    • Open Source

    #Calendar #Appointments and Scheduling #Encryption

  6. Rainloop Landing Page
    Rainloop Landing Page
    6

    Rainloop

    RainLoop is a web based email client.
    Pricing:
    • Open Source

    #Email #Email Clients #Email Management

  7. Nextcloud Calendar Landing Page
    Nextcloud Calendar Landing Page
    7

    Nextcloud Calendar

    The Calendar app is a user interface for Nextcloud's CalDAV server.
    Pricing:
    • Open Source

    #Calendar #Appointments and Scheduling #Email 4 social mentions

  8. Roundcube Landing Page
    Roundcube Landing Page
    8

    Roundcube

    Web-based IMAP email client
    Pricing:
    • Open Source

    #Email #SMTP Server #Email Clients 16 social mentions

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