Hi, i need a plugin or method that do this: when a user click and add a product in the shopping cart automatically the system add one more product, but free.
But not the same product another one. Who can help me?
This component by DayCounts might be what you need. Their site says it's now VM2 compatible. We've had several clients use it and like it.
http://www.daycounts.com/en/shop/joomla-15/bonus-items-for-virtuemart/