Automattic

WooCommerce

SomewhereWarm

Manos (a11n)

Chris Lilitsas (a11n)

Free add-on for the official <a href="https://woocommerce.com/products/gift-cards/" rel="nofollow ugc">WooCommerce Gift Cards</a> extension that allows you to use the default coupon form to apply and redeem gift cards.
After activating the plugin, the “Have a Gift Card?” form will be hidden, and customers will be able to apply gift card codes using the coupon input field.
Note: This plugin has been created to validate and refine a feature that may be rolled into WooCommerce Gift Cards — or dropped! — in the future.
Important: This plugin is not compatible with the Cart and Checkout Blocks.
Important: The code in this plugin is provided “as is”. Support via the WordPress.org forum is provided on a voluntary basis only. If you have an active subscription for WooCommerce Gift Cards, please be aware that WooCommerce Support may not be able to assist you with this experimental plugin.

Gift Cards – Coupon Input

Free mini-extension for WooCommerce Gift Cards that allows you to use the default coupon form to apply and redeem gift cards.

Tom Baumgarten

SCF is a simple plugin to create inputs for your forms with the same style everywhere, in your plugins or your theme. This plugin manages many fields so that they are efficient, accessible, versatile and homogeneous everywhere. A lot of options and multiple hooks. Made by developers, for developers. 
Compatible with CF7.

Simple Coherent Form

A simple plugin to create coherent inputs between themes and plugins. Light, efficient, accessible and compatible with CF7. Best for developers.

Gift Cards – Coupon Input vs Simple Coherent Form