SendLater - Email scheduler for Mac Mail.
Drip Scripts - Create automated email sequences in 60 seconds
Assistant.to - GoToMeeting. Put your GoToMeeting link in the Assistant. to "Location" field. Once the recipient selects a time, you will both receive an invite with a unique GoToMeeting link.
Campaign Genius - Send dynamic email content through any platform, instantly.
Shortwave - Email smarter & faster with a reinvented experience for your Gmail
Polymail Sequences - Simple, powerful multi-stage email campaigns