Onboarded - User Onboarding as a Service
Domcomp - No-nonsense domain price comparisons, updated daily
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Pricepeek - Compare prices of the same product across all Amazon locales
PriceCute - Keep up with your competition's pricing on Amazon
The Mac Index - Compare Apple product prices in different countries