RTM Notifier doesn’t do much at the moment but the developer says that he will add other features if more people will find it useful. In the current state it just displays notifications periodically to inform you how many tasks are due. Allows you to configure how often you are notified.
One important thing that is missing in the present app is the ability to post tasks from the desktop, with out this feature it is not of much use.
Download RTM Notifier