- Honey-Automatically applies promo codes to use on your purchases. Honey also works on Amazona and even compares Amazon sellers to see who has the best price this is including the factor of prime.
- Retailmenot -also has a chrome extension to automatically apply the code for you. They also combine cashback and the promo savings.
- Offers.com- Checks for promo codes and also checks for buy one get one codes and free shipping codes.