macroman

Creates blog posts from Amazon.com search results. Requires an AWS key pair (obtain from https://affiliate-program.amazon.com/gp/advertising/api/detail/main.html). Has the ability to search any index for the given search keywords and add a blog post for each of the results. 
Can customize: 
 * The search index 
 * Search Keywords 
 * Maximum description length 
 * The categories to which the posts should be added 
 * The maximum number of posts to create
The styles of the post are hard coded as of now. I’ll add a separate css for the styling of each of the elements when I get some time. To add affiliate tags to links to Amazon. please use the Amazon Affiliate Link Localizer plugin. 
To see a demo please visit http://games.steamsigs.com.
<h3>Non-Wordpress version</h3>

Vivamazon

This plugin creates blog posts under any user specified categories, from Amazon.com search queries.

2kblater.com

Features
<ul>
<li>Product Variants and Versions</li>
<li>Sell wide range of physical and digital products in Worldwide, Germany, United Kingdom, Canada, Japan, Italy, China, France, Spain, India.</li>
<li>Amazon Affiliate API integration with 90 days cookie duration</li>
<li>Product as post</li>
<li>Product attributes smart management system</li>
<li>Import by ASIN, Category Search and Amazon.com link</li>
<li>Supports of similar products</li>
<li>Supports of most wordpress themes</li>
<li>Filter Widgets – Categories, Attribute slider, Attributes count with link (very cool stuff)</li>
<li>Completely removable</li>
</ul>

2kb Amazon Affiliates Store

Amazon Affiliate Store With Variants, Cart, Checkout, Custom Themes. Easy to manage and setup. Sell wide range of physical and digital products.

Vivamazon vs 2kb Amazon Affiliates Store