QuickMark - QuickMark makes everything possible.
AliPrice - AliExpress Price Tracker app lets you track the price history of any item from many online retailers like AliExpress, Daraz, and Amazon, etc.
ZXing - Barcode Scanner for Android
idealo - Idealo is a free to use mobile application that helps you to find products, compare price and make an informed decision.
ConnectUpz - Helping service businesses to connect and grow your customer base by becoming part of of a larger ecosystem.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.