Splashtop Remote Desktop Personal – $.99 – amazing way to control your computer from your iPad!
Noteshelf – $4 – this has been one of the apps I've used as a whiteboard through the years.
Fantastical for iPad – $5 – 50% off for a little while. If you don't have an alternative calendar app get these!
Fantastical for iPhone -$3 – 40% off for a little while. This is a no brainier purchase if you are still using Apples app
Pixelmator – $2 – Amazing photo app for iOS and Desktop (which I believe is also on sale for $15 right now!)
KORG has stepped up their game! 50% off their apps as well as their IAP's until Dec 28th!
If you want to get to making some music with your iOS device then these prices can not be beat all year long!