Evolution Alternatives for Mac OS X

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

Microsoft Outlook is a personal information manager from Microsoft.

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

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

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

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

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

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

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

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

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