Reminders is a component of iOS and macOS that allows users to set notifications for themselves and create lists. It was a new feature in iOS 5 and OS X 10.8 "Mountain Lion". It can sync data between iOS and OS X through iCloud.
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.
A smarter way to keep up with your birthdays. Never miss a birthday again, and never feel uninspired again. Create personalized reminders with funny quotes, images or videos. Prepare your wishes in advance when you have time, and save them for later so you don't have to...
Holiline Reminder is both an event reminder and a calendar. Holiline’s aim is to ensure that you do not forget about a friend’s birthday, an important holiday, or another significant event. By default, it takes over the taskbar to remind you about important events that are...Discontinued
Seems no longer actively updated, the latest version 3.3.0 was released on 6/25/2015.
Intuitive task management/reminder app for the Mac.
Just drag the items you want to be remembered of to the Alarms menu and place them on the time line. Due items can be dragged just further right or even to another day. Creating a timer is just one single drag away.
The product is no longer available on the official website and on the Mac App Store.
Later is a simple iPhone reminders app that lets you schedule a reminder in natural way by choosing to remind you about something this evening, tomorrow or next morning.
The Mac program is no longer available on the Mac App Store and the iOS app seems no longer updated. Last version, 1.4, released in October 2018, can be still downloaded from the Appstore for free