Kippa - From inside Teams, Kippa reminds you or your team-members about events to keep the team running like clockwork.Kippa's five-minute learning curve enables you to quickly set personal and shared reminders, (@mentions), or to Private Channels.

Smart Slack Reminders - Schedule follow-up questions to any message in Slack 💬

Reminder - A better way to keep track of your reminders 📝

RemindUs - Advanced reminders for Slack teams

doo - A smart, simple app for reminders and to-dos

PullReminders - Review and release pull requests faster with Slack reminders and metrics.