Zen Cart BOGO Discount allows you to offer "Buy some-number, get some-number" discounts across your entire inventory.
If you need BOGO offers on just a few items in your store (not the entire store), please look at Better Together or Discount Chooser.
Cart Version: Zen Cart 1.3.9, 1.5.xProduct Version: 1.3
For more information, please visit this product's webpage.