FeedbackEmails - Amazon Feedback and Review improvement tool for merchants on Amazon.
BQool - BQool is the best Amazon seller solutions for managing pricing, feedback and reviews.
Jungle Scout - Amazon product research made easy.
Reputon Customer Reviews for Shopify - Facebook, Trustpilot, Yelp, Google reviews. Survey & Feedback.
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
FeedbackFive - Automate seller feedback and product review requests to get more of both.