It allows you to set free shipping each product.

requirements
Vqmod: 2.4.0+ (Only OC 1.5.x)

Settings
Access the administrative menu OpenCart> Go Menu Catalog> Products> Insert / Edit> On Data tab modify the "Free Shipping" option.

Install
Go to Extension > Shipping > Free > Configure, Active and Save.

Demo
http://opencartclub.com/modules_test/samsung-syncmaster-941bw
http://opencartclub.com/modules_test/iphone