AMZScout - AMZScout extension will help you make a decision about picking a niche based on the actual data, not intuition.
A2X - A2X automates ecommerce accounting for Shopify, Amazon, Etsy, Walmart and eBay sellers worldwide. Trusted by hundreds of leading ecommerce accounting firms.
Jungle Scout - Amazon product research made easy.
Helium 10 - Our software contains multiple Amazon seller tools to help you find high ranking keywords, identify trends, spy on competitors, & optimize product listings.
ProfitGuru - ProfitGuru is the easiest way to find the most profits on Amazon.
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.