https://woocommerce.com/products/free-gifts-for-woocommerce/

Award Free Gifts for making purchases on the siteFree Gifts can be automatically added to the user’s cartCustomers can choose their Free GiftsAdmin can create any number of rules in advanceFree Gifts rules can be configured based on Cart Subtotal / Cart QuantityAdmin can manually offer Free Gifts to any userMaximum number of Free Gifts per order can be customizedOption to restrict Free Gifts if a WooCommerce coupon is already applied in cartOption for the admin to restrict multiple quantities of the same product being chosen as a free product

Changelog

2024-04-27 - version 11.1.0

* Tweak - Supported for Alia Currency Switcher plugin based compatible

* Tweak - Multiple Product selection supported in the Buy Product field[Buy X Get y mode]

* Tweak - Conditional option added to consider the Buy Product when multiple products were selected case

* Tweak - Additional option added to consider the Buy Quantity calculation[Product with Least Quantity will be considered]

* Tweak - Supported awarding the product as Free Gift when it is in the Backorder case

* Tweak - Tested with WordPress v6.5.2

* Tweak - Tested with WooCommerce v8.8.2