DealExtreme - Online shopping for cool gadgets at the right price.
AliPrice - AliExpress Price Tracker app lets you track the price history of any item from many online retailers like AliExpress, Daraz, and Amazon, etc.
Fasttech - Fasttech is one of the best platforms for buying gadgets and electronics at the best rates.
idealo - Idealo is a free to use mobile application that helps you to find products, compare price and make an informed decision.
Zalando - Zalando is a online retailer, offering Fashion and Lifestyle products.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.