I made my own Amazon Affiliate Link Generator using PHP. I think it is the best generator out there because it so simple.

You must know what the ASIN of the item is. You also need to have an Amazon Associate ID, which you can get from the Amazon Affiliate website. On their website they offer a more advanced Link builder, which is great, but you have sign in and fill out a more complicated form .

Here is an example link using my Associate ID. I have some ideas for possible future development on a similar tool.