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

eM Client is a Windows based e-mail client for sending and receiving e-mails, managing calendars, contacts, and tasks.

Geary is an email application built around conversations, for the GNOME 3 desktop. It allows you to read, find and send email.

KOrganizer is the calendar and scheduling component of Kontact, the integrated personal information manager from KDE.

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

Microsoft Outlook is a personal information manager from Microsoft.

Claws Mail is a free and open-source, GTK+-based email and news client. It offers easy configuration and an abundance of features.

EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries, e…

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

Microsoft Mail and Calendar apps help you stay up to date on your email, manage your schedule and stay in touch with people you care about the most.

Mailspring is a multi-platform email client.

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