Kiwi for Gmail - Dedicated Gmail client with clean integration of Google Calendar, Contacts, Google Drive, and...
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
Shift - Shift is the ultimate email client for managing Mail, Calendar, Drive, Slack, Asana, Jira, Evernote, and all your other favourite apps
MailClark - The Slack bot for external communications
POP Peeper - POP Peeper is an email notifier that runs in your Windows task bar and alerts you when you have new...
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.