Back to School--Best Personal Calendar, Planner, Organizer Apps on the Internet

Okay, I admit it--I am an organizer-ophile. We online freelance WAHMs and SAHMs have to be if we want to juggle it all. With back to school on every parent's lips, personal planners are hot commodities.  But I am also a tightwad--I will not pay for cellphone organizers apps or software. And I don't have to, nor do you, when there are so many free calendar, student planner and personal organizer apps on the net.  Best Personal Calendar, Planner, Organizer Apps on the Internet