Vouch

Finding discount codes is time-consuming and repetitive; Vouch takes the hassle out of looking for a discount code by automatically finding and trying each one for you when you're at the merchant's checkout. If multiple codes work, Vouch will even apply the best one for you, with the biggest discount.

Vouch also instantly reveals the voucher code on many leading discount code sites - no need to click to reveal any more, the code is visible as soon as you open the page.

Currently supports over 1000 stores, more are being added every day. Completely free: no spyware, no toolbars, no ads! Just simple money-saving.