Jungle Scout - Amazon product research made easy.
AMZScout - AMZScout extension will help you make a decision about picking a niche based on the actual data, not intuition.
ProfitGuru - ProfitGuru is the easiest way to find the most profits on Amazon.
AmzChart - AmzChart is a free Amazon analysis tool to scale your Amazon business.
Site Search 360 - Site Search 360 enhances and improves your built-in CMS or product search with autocompletion, semantic search, filters, facets, detailed analytics, and a whole lot of customization options.
Inventory Spy - Spy how many products remain on any Amazon Product’s offer listing page.