aheadWorks -
@galtsow_aheadworks
Automatic Related Products 2
Define the rules for related products and offer people alternatives to the current product automatically.

Features:

Automatic on-the-fly products relations - start working immediately with no delays
Fast work on the stores with a huge quantity of products
Separate blocks for shopping cart, category, and product pages
Customize user groups that can see the block
Ability to show several blocks on one page
Sort blocks order by priority
Ability to randomize displayed products
Start and end date of block display
Ability to sort products in block
Ability to display out-of-stock products in block
Four predefined positions
Flexible positioning
Fully customizable rules
Integration with Follow Up Email v.3.5+ by aheadWorks