grexit.comSoftware by GrexIt Software
Front - multi-channel inbox service for collaborative teams
Polymail - Native email app for email productivity.
Mailor - Shared inbox, team portal and smart notifications
Morning Mail - A new way to manage your mail. Tinder for email.
Gmail Sender Icons - Know the sender's company by adding favicons to Gmail
Mailbird - Mailbird is the best email client for Windows 7, 8 and 10