Recurrr - Send recurring emails
Slack Jira Integration - Easily keep issues moving right from Slack
Right Inbox - Schedule Emails in Gmail To Be Sent Later
Sortd for Slack - Get Trello-style project boards right in your Slack!
SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.