I would say the apple office sweet is the best one for the iPad. Unfortunately, each app is going to cost you ten dollars. I will say that pages is worth the $9.99 price tag. I have owned it for about five days now and I have already used it multiple times. I have not purchased keynote or numbers yet so I do not know too much about them. I did some researching and it looks like Documents Free is going to be your best route if you are not up for putting in a little money. If you are looking to take notes, Evernote is a great free app for that. I hope I could help you out!