grexit.comSoftware by GrexIt Software
Front - multi-channel inbox service for collaborative teams
Mailor - Shared inbox, team portal and smart notifications
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
Gmail Sender Icons - Know the sender's company by adding favicons to Gmail
Missive - Team communication app now supporting FB, Twitter & SMS
Gmelius for Gmail - Gmail on steroids. Scheduling, reminders, follow-ups & more.