SD Coupon is a coupon plugin for wordpress which is free and easy to use. You can hide your coupon codes under affiliate links using this plugin. Just download it from the below link and upload to your wordpress plugin section. Then activate it and use it!
SD Coupon Review
Screenshots
Here have a look on the screenshots of this coupon plugin. See how simple and easy it is! It’s free to use in wordpress sites. It has all features what you will need.
Screenshot 3: Coupon dashboard
Screenshot 3: Coupon view
Screenshot 3: After click the coupon