I'm also using Indxu and it’s a good coupon plugin. It’s actually pretty neat. If you’re using Google Chrome, Firefox or Coccoc browsers, Indxu has a free extension available for you. Indxu extension works by researching promo codes and coupons for popular retailers to make it easy for people to save money shopping online. When the Indxu icon lights up, you can click on it to view all available sales and coupon codes.