Pricepeek - Compare prices of the same product across all Amazon locales
Wikibuy - Find lower prices at other sellers while you shop on Amazon
Luzme - Never pay full-price for an ebook again
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Savings.com - Compare prices at local stores & discover the best deals
CouponFollow Cently - Coupons at Checkout is a browser plugin for Chrome, Firefox, Internet Explorer, and Safari that...