There are times when you receive an important call from someone and you cant attend it, and you missed it. Now there is no way by default in iphone which could remind you about those missed calls via pop up message notifications again and again.
There is $ 0.99 cheap app you can find on cydia under BigBoss repository which allows you to get alert or reminder several times, you can also set the time interval and can also light up flash with LED after some time in case you miss the notifications but this feature will be applicable to iphone 4 only.
There will be no new icons added after installing MissedReminder, you can configure the settings of MissedReminder under iphone settings. You can configure after what time you should get the first reminder, how many times it should remind and the repeat interval time.