Kiwi for Gmail - Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and...
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
MailTab for Gmail - MailTab for Gmail is the ideal app for instantly accessing your Gmail account without having to open your web browser.
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Airmail - Airmail is a lightweight and lightning fast mail client for Mac.
eM Client - eM Client is a fully-featured email client for Windows and macOS with a clean and easy-to-use interface. eM Client also offers features for calendars, tasks, contacts, notes, and chat.