Garden - Container Engine
NetHunt CRM - Turn Gmail into a smart CRM
Affinity - Relationship Intelligence, Reimagined
Streak - Manage customers inside Gmail
Followup.cc - FollowUp for email is a lightweight productivity suite that keeps your conversations and tasks from slipping through the cracks. Set perfectly timed reminders that arrive at the top of your inbox, right when you need them.
Nureply - Email marketing software made for cold email marketing professionals. Using advanced AI to generate email personalization in seconds