I love the fact that we can download apps onto our phones - often for free - that can help us be better and/or smarter shoppers.

Here are some popular free apps to help you save money.

Coupon Sherpa compiles internet coupons from various stores into one app. It even uses your smart phone's built in GPS to determine your location and provides directions to the closest store. 

RedLaser allows users to scan the barcode of an item, and it shoots back prices from competing stores and online merchants to help you find the best deal. Another cool feature - you can scan a book's barcode and the app finds nearby libraries with a copy.

PriceGrabber helps you find the lowest prices on millions of products from thousands of online merchants. You can compare prices, read reviews and get merchant ratings.

Grocery iQ tracks down coupons in real time. When you create a shopping list, the app highlights items that have online coupons.

Cellfire loads coupons from grocery stores and other retailers onto your loyalty cards. When you enter a store that provided one of the coupons, the app sends a mobile reminder.

The Find gives consumers the opportunity to scan barcodes, find the best price, search for deals and create a shopping list. You can also set a price alert for a scanned item so you don't miss out on a deal if the price goes down.

What are some of your favorite shopping apps?