Music Flee - Compare prices of music from iTunes and Amazon easily.
dofo.com - Domain search platform Dofo.com gathers all registered (350 million) domains of the world in a single place. Dofo also brings together all the domain names that are on sale, provides useful features, all completely free.
Pricepeek - Compare prices of the same product across all Amazon locales
Waatcher - Automatically buy on Amazon at your target price
.TECH Domains - Domain names for the new tech revolution
Wikibuy - Find lower prices at other sellers while you shop on Amazon