Test this extension here: try.jigoshop.com
Our Up-sells & Cross-sells extension extends Jigoshop to add up-sells and cross-sells to your store’s product and checkout pages. New panels are added to the edit product page in order to set up-sells and cross-sells – you have full control over what products are included.
Up-sells are items which you want to promote on single product pages in an attempt to get customers to buy them instead of the currently viewed product.
Cross-sells are products you want to display on the checkout page in an attempt to get customers to purchase them as well as the other items in their cart.