Pricepeek - Compare prices of the same product across all Amazon locales
Wikibuy - Find lower prices at other sellers while you shop on Amazon
Savings.com - Compare prices at local stores & discover the best deals
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
The Mac Index - Compare Apple product prices in different countries
CouponFollow Cently - Coupons at Checkout is a browser plugin for Chrome, Firefox, Internet Explorer, and Safari that...