You can join Ebates.com for free. Ebates is an online shopping center that gets commission from stores that members make purchases from. When they receive their commission, they pass along the savings to their Ebates members. Members can earn up to 25% rebates on purchases.
This site offers online shopping rewards. When you make your purchases through your account, you earn points.
This site offers coupons that users can print directly from their computer. They have a vast array of well known retail coupons such as Walmart and JC Penney