There are a number of Wordress plugins which work in different ways, so it is important that we understand what functionality we want from them before making a buying decision. The type of affiliate plugins deployed depends very much on the affiliate linking strategy. If you are using a theme such as Re:Hub with a combination of Amazon, Ebay and CJ Affiliate links then you will need a plugin such as – Content Egg. If you are making an online store with a theme such as Kingdom populated with products from Amazon then you will need a plugin such as – WooZone.
There are alternatives but some of the other plugins I have now tested lack some key features such as keeping the product information updated. The two plugins mentioned above have this pretty key functionality, hence the recommendation. They are also well supported should something go wrong.