Locotracky amazon price history comparer - We are the amazon price comparator, we inform you every time a product drops in price so you can save on all your purchases.

RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.

NexTag - NextTag is one of the oldest comparison shopping engines

Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything

Camelcamelcamel - Easily monitor Amazon product prices and get alerts when they drop.

Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.