Facebook: Follow dealsplus, for alerts on deals as well as prizes and coupons.
Better Christmas List, $1.99: List, budget and track your progress on your Christmas gift quest. You can keep it all password-protected on your phone.
Car Finder, 99 cents: Uses GPS to mark the location of where you parked your car in the mall parking lot.
Shopsavvy (free): Best bar code scanning app. It gives you online price comparison when you scan a barcode, and shows prices in local stores near to your location.
CNET Reviews (free): Compare specs and get expert opinions and ratings on tech gifts, all while you're in the store.
FastMall (free): Maps bathrooms, stores and exits in thousands of malls across the country.