Reminders is an application for iOS and OS X that allows you to set notifications for yourself and create to-do lists. Quickly sync and create reminders from voice assistants, email, task managers, and more — with Applets. This service requires the IFTTT app for iOS.

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.