Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Capital One Shopping - Get the best coupon code, the best price, and alerts when items you viewed go on sale.
Invisible Hand - InvisibleHand gets you the lowest price on shopping and flights.
Amazon Coupons - Save with Amazon Coupons. Clip the coupon and add the item to your cart. Discount will be applied at checkout.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Southern Savers - Save up to 60% on groceries by matching great coupons with awesome deals!