Open Source Google Calendar Alternatives

    The best open source alternative to Google Calendar is Etar, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Google Calendar and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Google Calendar are Calendar Lock PEA (Free, Open Source), Lightning Calendar (Free, Open Source), Simple Calendar (Freemium, Open Source) and Nextcloud Calendar (Free, Open Source).

    This page was last updated Jul 6, 2021

    1. RemindMe is a windows desktop application that will notify you of events that you created using this application. RemindMe will create a popup on the middle of the monitor you have your mouse cursor on(if you have multiple monitors).
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    2. Clean Google Calendar is an open-source Google Chrome app that makes Google Calendar look nicer and function as a desktop app. The app began as a user style for .
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    Showing 22 of 22 alternatives