Kiwi for Gmail - Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and...
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
Wavebox - The powerful productivity browser like no other, multi-account sign-in, tab sleeping, groups & pins
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.