Redlaser Why it's great:
This app scans any bar code and uses Google Product Search and TheFind.com to locate the best price. At Best Buy, Money saw two Blu-ray movies for $29.99 each; RedLaser found them for $19.99 at Walmart.com. Best Buy matched the price on the spot. Result: a $20 savings. Cost:
$1.99 NEXT: What's this fabulous house listed for?