Alternatives to Microsoft Office Outlook for Android with Open Source License

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Show 13 less popular platforms
  • K-9 Mail icon

    K-9 Mail

    K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support...

    Free Open Source Android Android Tablet

    • Not the prettiest, but it's open source (trustworthy), free, privacy-respecting and very functional. My go-to Android email client. I cannot hesitate less in recommending it. JohnFastmanJan 2017 • 1 agrees and 0 disagrees Disagree   Agree
    • Deletes e-mail from the server even when underground in NYC subway. Makes life so easy to delete e-mails while on the train When surfacing, K-9 syncs with the server and POOF....those unwanted e-mails are gone from the server. Online_Purchases1Feb 2017 Disagree   Agree
  • Open365 icon

    Open365

    The open source cloud with LibreOffice online - LibreOffice online + Seafile + KDE. Improve your productivity and communicate better with your team members. The world is...

    Free Open Source Android Self-Hosted

    • Discontinued The project seems to be no longer developed. Last commit on the GitHub repo was made on June 27th, 2016, but it can be still downloaded and installed.
  • AnCal icon

    AnCal

    AnCal stores yours appointments, tasks and notes, which you can easily add and edit. You can also set alarms for selected items and see day, week and month reports of...

    Free Open Source Android

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