Jungle Scout - Amazon product research made easy.
RetailMenot - The RetailMeNot mobile app allows you to find deals on the go for both online shopping and in store shopping.
Helium 10 - Our software contains multiple Amazon seller tools to help you find high ranking keywords, identify trends, spy on competitors, & optimize product listings.
Slickdeals.net - Slickdeals: The Best Deals, Coupons & Discounts on everything
Sellics - Sellics helps you to boost Your Amazon sales.
Honey - Honey is a browser extension that automatically finds and applies coupon codes at checkout with a single click.