Right Inbox - Schedule Emails in Gmail To Be Sent Later
Salesflare - Simply powerful CRM. Automates your data to build better relationships and make more sales.
Recurrr - Send recurring emails
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.
FollowUpThen - The simplest way to schedule an email reminder
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.