there is this stuff that I use on my feet calle "miracle foot repair" that is really good stuff. It was/is sold in one of those tv advertorial type things but I got it in a store. They also make this stuff called miracle hand repair which is essentially the same thing. The primary ingediant and what sets it apart from drugstore hand creams is "ALOE". Its 60-70% aloe and you can see a difference the 1st time you use it. Keeps the cracks away from really dry feet so I would imagine it would do the same for your hands.
Warren