Polymail - Native email app for email productivity.
Front - The platform for exceptional customer service at scale.
New Gmail - The new version of Gmail web
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
Airmail for iOS - One of the best Mac email clients, now on iPhone
Missive - Team communication app now supporting FB, Twitter & SMS