n3k4

This plugin will lookup previous orders that contain the current item and return the other items that were included with the order. Including relevant items like this will help increase sales as well as adding more link depth to your site.
Obviously, you will need the Cart66 Shop plugin to use this. If you try to use it without it then good luck with that. You can change the amount of items shown in the settings page that is a sub-menu of the Cart66 settings. Also, you can edit the layout of your loop template in the views/template.php file.

Cart66 Also Bought

Help increase sales by showing relevant items that were also bought by previous customers.

Bruce Findleton

Cartalog is a companion plugin to the Cart66 product, the Lite or Pro version, you’re choice. 
It provides a quick and easy way to add product listings, by category, to any page 
on your site. Using just a couple of shortcodes you can add product shots, links to detail pages, 
descriptions and a fully capable Cart66 “Add to Cart” button. For multiple product categories you 
can group items into category groups with nice headings and titles.
(Not to be confused with the iPad app of the same name by that fine Lucas Mendes Menge chap)

Cartalog

Cartalog allows you to add product listings quickly and easily to any page on your Cart66 enabled site.

Cart66 Also Bought vs Cartalog