Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.
Price Tracker for Amazon - Price Tracker for Amazon is a shopping app that allows you to browse for favorite products from famous online stores know as Amazon for a better price.
Invisible Hand - InvisibleHand gets you the lowest price on shopping and flights.
AliPrice - AliExpress Price Tracker app lets you track the price history of any item from many online retailers like AliExpress, Daraz, and Amazon, etc.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.