Apples

When I was visiting my Grandparents last week, I picked two big boxes full of apples from their tree. I was so excited to get that much fruit for free! (I'm pretty much a sucker for anything free!)
I have been trying to get them all processed so they don't go bad. The girls have eaten some of them whole, but they are a little tart so they usually don't finish them.
I have used up one box so far. I have made three crock pots full of applesauce. It is so yummy and it smells so good while it's cooking. We have been eating some of it, but I also put a lot of it in the freezer.
I also put several sliced, peeled pieces in the freezer to pull out whenever I want to make a crisp or pie.
I borrowed my Mother in law's dehydrator and made some apple chips also.
I'm planning on doing more of all of these things, but I was wondering if anyone had any other ideas of things I could do with them to either use them or preserve them. I would love to hear your ideas!