Unforgettable

From Weaver Spider Software:

Have you to remember something on September 21 three years later? Have you to pay something every 4 months? "Unforgettable" is the reminder that remembers for you all your engagements. It's easy to use. You have only to communicate to it all the dates of your engagements with other data and how many days before you want to be warned. It can manage thousands of events. The program does not use system's resources while you use your computer with other programs, the control appens during the "Windows" start.