Discount Ninja Promo Engine

Excellent app. I use it to run secret sales to my VIP customers and do A/B tests on pricing. It works great. Finally i can give a unique discount code to each client THAT expires after x time, so i don't need to worry about coupons being distributed everywhere on the web. Brilliant.

The developer continues to add really great features. Really great support. I cannot wait for the reports to become available.