Wikibuy - Find lower prices at other sellers while you shop on Amazon
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
ebates - Find thousands of coupons, promo codes and discounts.
CouponFollow Cently - Coupons at Checkout is a browser plugin for Chrome, Firefox, Internet Explorer, and Safari that...
link-o-mat - Cashback Portal - Verdiene mit linkomat Cashback - weltweit über 9500 Shops