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.

johndaskovsky

<a href="http://howtononprofit.wordpress.com/classdex/" rel="nofollow ugc">Read the detailed documentation.</a>
<a href="https://wordpress.org/support/plugin/classdex" rel="ugc">Questions? Post in the forum.</a>
Written for yoga studios and other educational facilities that are focused on registration based classes. 
ClassDex is a robust system that brings together student contact information, class details, 
class registration, payment tracking, and basic accounting reports. 
Integration with Mailchimp automatically sends student emails to a mailing list. 
Integration with Cart66 enables easy online registration and payment for classes.

ClassDex

A class and customer management system for Wordpress.

Cart66 Also Bought vs ClassDex