Call me when I have a reminder due

FollowUp.cc is a timed email reminder system that gives users the ability to create reminders via email through formatted email addresses in the TO, CC and BCC fields. Allows users to set time based email reminders for individuals or from groups for single or recurring events.
Slack brings all your team communication into one place. Turn on Applets to bring important information into channels, quickly share photos, automate reminders, and much more.