Made this little reminder app for my girlfriend after she forgot a car payment. You give it a list of events, the days-of-the-month they're due, and the number of days you'd like to be notified in advance. Every day, it goes through the list, checks each to see if you haven't done it yet for the month and if the current day is w/in the window you specified. If true to both, you get an email. If you don't mark the event as done, it rolls over to the next day, so it won't forget even when you do.
I realize this is "just another calendar app," but I think that pestering/nagging feature is pretty cool. When paired with SMS interactivity instead of just email, I'm hoping it could be something pay-worthy... but I want to see what people think of it before I build that functionality.
Anyway, I'd LOVE to hear what HN thinks. Cool? Not cool? Already done 1000x before?
Currently in private beta, but here's a super-secret invite URL for HN: http://romulist.com/invite?code=hn