Thunderbird

Open Source

Thunderbird is a open source mail client developed and maintained by Mozilla foundation.

Apple Mail

Free

Apple Mail is an email client included with the operating systems macOS, iOS and watchOS by Apple Inc.

Lightning

Open Source

Lightning App Builder is a point-and-click tool that makes it easy to create custom pages for Salesforce1 and Lightning Experience.

Apple Calendar

Free

Calendar is a personal calendar application made by Apple Inc. that runs on both the macOS desktop operating system and iOS mobile operating system.

Sylpheed

Open Source

Sylpheed is an open-source e-mail client and news client licensed under the GPL.

Zimbra Desktop

Free Personal

Zimbra Desktop is an offline client that lets you manage various email accounts in one desktop tool.

Kontact - KMail

Open Source

KMail is the email component of Kontact, the integrated personal information manager from KDE.

Polymail

Freemium

Polymail is an email application for OS X and iOS known for its clean interface and additional features atop the Gmail platform.

Microsoft Office Outlook

Commercial

Microsoft Outlook is a personal information manager from Microsoft.

SeaMonkey

Open Source

SeaMonkey is a free and open-source Internet suite.

Postbox

Commercial

Postbox is powerful, intuitive, ultra-customizable, speedy task manager.

Airmail

Commercial

Airmail is a fast mail client for Mac and iPhone.

Mutt

Open Source

Mutt is a text-based email client for Unix-like systems.

OpenProject

Open Source

OpenProject is a web-based project management system for location-independent team collaboration.

Spark

Free

Spark is a fast, smart mail manager app.

MailMate

Commercial

MailMate is an IMAP email client for macOS featuring extensive keyboard control, Markdown integrated email composition, advanced search conditions.

Compare Microsoft Mail and Calendar with alternatives

Thunderbird vs Microsoft Mail and Calendar

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Microsoft Office Outlook vs Microsoft Mail and Calendar

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Apple Mail vs Microsoft Mail and Calendar

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SeaMonkey vs Microsoft Mail and Calendar

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Lightning vs Microsoft Mail and Calendar

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Postbox vs Microsoft Mail and Calendar

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Apple Calendar vs Microsoft Mail and Calendar

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Airmail vs Microsoft Mail and Calendar

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Sylpheed vs Microsoft Mail and Calendar

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Mutt vs Microsoft Mail and Calendar

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Zimbra Desktop vs Microsoft Mail and Calendar

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OpenProject vs Microsoft Mail and Calendar

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Kontact - KMail vs Microsoft Mail and Calendar

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Spark vs Microsoft Mail and Calendar

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Polymail vs Microsoft Mail and Calendar

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MailMate vs Microsoft Mail and Calendar

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Microsoft Mail and Calendar Mac OS X Alternatives

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