BQool - BQool is the best Amazon seller solutions for managing pricing, feedback and reviews.
Amazon Repricer - Price Optimization
Sku Grid - Sku Grid helps marketplace sellers to be competitive and keep in sync with various suppliers. Lots of different suppliers are supported, including retail ones for drop shipping. Sku Grid works with eBay, Amazon, Shopify, Bonanza, Woo and others
Price2Spy - Price2Spy is a price monitoring, pricing analytics, and repricing tool, meant to help eCommerce professionals keep an eye on their competitors or retailers.
RepricerExpress - RepricerExpress is a Amazon and eBay repricing solution to keep listings competitive without constant attention.
HyperSKU - Shopify dropshipping App - sourcing directly from factories, 7-12 days express shipping, and automated system.