DontForget will remind you...

DontForget is a utility that will remind you of any unread SMS or MMS, missed incomming call or missed reminder. It's quite nice because often I would just forget to call back someone. I would just dismiss a reminder on my device and do the same in my mind. It's a free software and works on smartphones running WM5 only. Try it and if you don't like it, remove it. Don't forget!