SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Recurrr - Send recurring emails
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
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.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI