InvisibleHand for Windows, Chrome, Firefox, and Edge automatically searches and displays the lowest price for your purchase.

Piggy - Automatic Coupons & Cash Back is a Chrome extension that finds the best coupons and promotional codes and applies them automatically while you shop, saving you money.

Capital One Shopping: Formerly Wikibuy for Chrome and Firefox enables a simple and safe online shopping investment option.

Avira Safe Shopping for Chrome, Firefox, Edge, and Opera is an extension to ensure your safety and privacy while shopping and looks for better deals from other websites.

Fakespot for Chrome analyzes product reviews for reliability, helping to protect you from bad sellers and fake reviews on Amazon, etc.

Honey for Chrome, Firefox, Edge, and Opera helps to automatically find and apply coupon codes while online shopping for over 30,000 sites.

Keepa for Chrome, Firefox, Edge, and Opera provides price history charts for millions of Amazon products and can alert you when a price drops.

The Camelizer can show you historical pricing on Amazon in the United States, Canada, Europe, and Australia.

Misabel for Chrome gives instant price comparisons and price history charts, all to help save money while you shop online.

Cross for Chrome is a free Google Chrome extension that looks for better prices while you shop on Amazon.