IPhone for Parents - MUST HAVE!!

I will first say that I am NOT a fan of Apple!  However, I love my IPhone and all that it helps me accomplish.  I've had it since Feb'09 - a bday gift from my husb.  I was very frustrated with it at first, but I have found so many apps that are really useful and make my life so much easier.  If you can get one, you should!  Here are the most helpful apps that I am using now:  Evernote, Reqall and Dropbox.  There are many more, but I have to have these inorder to function!  I'll post details on each separately.