eDesk - Business Tools, Support, Sales, and Marketing, and Help Desk
Jungle Scout - Amazon product research made easy.
ChannelReply - ChannelReply enables online retailers to manage their marketplace customer service messages with the helpdesk of their choice.
A2X - A2X automates ecommerce accounting for Shopify, Amazon, Etsy, Walmart and eBay sellers worldwide. Trusted by hundreds of leading ecommerce accounting firms.
Richpanel - Customer Data Platform for Retail
Helium 10 - Our software contains multiple Amazon seller tools to help you find high ranking keywords, identify trends, spy on competitors, & optimize product listings.