New Web sites offering consumer coupons and online promotions are flooding the Internet. But while these sites offer a wide breadth of discounts, they're also making it more difficult to weed out the really good deals from the duds.

"There are hundreds, if not thousands of coupon sites out there offering the exact same thing," says Edgar Dworsky, founder of consumer advocacy site ConsumerWorld.org.

It's the relative sameness of these sites that makes it hard for shoppers to find the best deals and discern whether the offers they see are legit or not, says Mary Hunt, the founder of the money-management site DebtProofLiving.com

We asked consumer advocates and deal hunters to point out the free-coupon sites they turn to purchase after purchase. Here are five worth bookmarking:

Coupons.com: Phil Lempert, founder of consumer news site SupermarketGuru.com, praises this site's simple layout, which makes it easy to browse available coupons, and then print them out for in-store use. Enter your ZIP Code for area-specific deals.