Gene Cash's PIM Apps: Calendar, Checkbook, To Do and Database applications. Most people seem to prefer GPE or Seqretary for their calendars for the Home Screen applets. What I like about this calendar is that it automatically opens every night at Midnight, so 1st thing in the morning I can see what needs to be done that day and for the next 3 weeks. The checkbook is THE killer app for me; I can balance all of my accounts on the N810 and have for the past year and a half. These apps do have a bit of a learning curve, especially the checkbook app, but I feel it is well worth the investment of time for the utility they offer.