Campaign Genius - Send dynamic email content through any platform, instantly.

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

GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!

Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.

MailChimp Snap - Send simple, photo-based email campaigns from your phone.

Nylas Mail - The Nylas Cloud API powers your application with email, calendar & contacts features. Built-in features for better email, calendar, and contact management.