Rated 5 out of 5 stars
ReminderFox is a must have for anyone. It can literally save a life. I've used this addon for a year or so now and cannot live without it.
Just recently, I've had to use ReminderFox to schedule seizure medication for my Puggle, Bandit. It must be given twice a day and 12 hours apart. ReminderFox is helping to save my dogs life.
It has also reminded me of birthdays and other important dates, and these events can be repeated yearly. There's also a function to repeat monthly, daily, etc.
The to do list is fantastic as well. And, you can add any list. It's very versatile and configurable to specific user needs.