SendRecurring is described as 'web based tool for scheduling email and text reminders. It makes it easy to keep yourself or a group of people aware of anything important' and is an website in the Business & Commerce category. There are seven alternatives to SendRecurring, not only websites but also apps for a variety of platforms, including Gmail, Mailbox, FastMail and Android. The best alternative is FollowUpThen, which is free. Other great sites and apps similar to SendRecurring are Boomerang (Freemium), Memo to Me (Freemium), LetterMeLater.com (Freemium) and Followup.cc (Paid).
Email followups, scheduled as easily as this: email@example.com. Clear out your inbox by forwarding emails to FollowUpThen. Make sure your emails get responses. SMS Reminders. Easy reminders — an email away.
Memo to Me is online reminder service. It has very functional free version, but you can upgrade to get more functionality. Email reminders are always free and to use SMS reminders you have to buy SMS messages for $0.10 per message to cover costs.
FollowUp.cc was created to let people attach reminders instantly to any email. Since then, users have been scheduling their to-do list, scheduling tasks for others and keep conversations on track! FollowUp.
Mailreminder.net is the product of some of my own frustations with trying to remember stuff during the day. I have tried numerous todo list apps and websites to keep up with requests that end on my inbox.