There are quite few services which offers reminder for events through email. ReminderFeed is a similar reminder service which is totally FREE, but has a different way of reminding you about the task. ReminderFeed is a reminder service that delivers reminder messages right to your feed reader. All you need to do is to fill out a simple form and then subscribe to the feed of the reminder.
You can also protect your reminder with password, so that it restricts edits. Once you create your reminder, then you can subscribe to the feed in your favorite reader and then wait for the reminder to get updated in reader.
One good thing about this service is that you can inform about this reminder by asking all people related to this event by subscribing to feeds. And the downside of this service is that only people using a feed reader can use this service.
ReminderFeed is completely free of cost and a great way to remind yourself about any future events.