Noto - Email yourself. Fast.
Smart Slack Reminders - Schedule follow-up questions to any message in Slack ๐ฌ
Elephant - Elephant is a notetaker with a classic interface you already know.
RemindUs - Advanced reminders for Slack teams
Planniversary - Never forget a gift or a birthday / anniversary again ๐๐
PullReminders - Review and release pull requests faster with Slack reminders and metrics.