~~ Coupons at Checkout has been rebranded to Cently. You can read more about it here ~~
Coupons at Checkout is a web browser extension that works in tandem with CouponFollow.com to automate the process of finding and applying coupon codes on e-commerce sites for its users with minimal hassle. It aims to maximize your savings while minimizing time and effort. No longer will you have to interrupt your shopping experience to search for coupons. No more going back and forth copying and pasting codes you happen to find hoping they'll work. When you're shopping, the extension handles all of these tasks for you in a seamless manner while remaining as unobtrusive as possible. It's designed to be an extension you won't even notice until it can help you save money.
For more details please read the FAQ.