Wikibuy - Find lower prices at other sellers while you shop on Amazon
CouponFollow Cently - Coupons at Checkout is a browser plugin for Chrome, Firefox, Internet Explorer, and Safari that...
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
CouponMate - Browser extension that automagically searches for coupons
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
CheckMate - CheckMate powers online and mobile check-in for hotels and their guests.