Jungle Scout - Amazon product research made easy.
Drmetrix - DRMetrix is the first 24/7 commercial monitoring platform designed for the direct response television industry
Inventory Spy - Spy how many products remain on any Amazon Product’s offer listing page.
Hull - The engagement layer for the internet. Hull is a platform that offers identity management, user engagement, segmentation and targeted messaging for your app.
AMZScout - AMZScout extension will help you make a decision about picking a niche based on the actual data, not intuition.
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.