ahuseyn

This airweight plugin will help you to generate unique WooCommerce coupon codes as much as you want. It allows you set coupon details before generation.
Features:
<ul>
<li>Native WordPress page look, without any distraction and annoying notification</li>
<li>Create multiple coupons at once</li>
<li>Define same prefix for all coupon codes</li>
<li>Unique coupon codes with PHP uniqid function</li>
<li>Set coupon expiry date</li>
<li>Set coupon value</li>
<li>Set usage limit per coupon</li>
<li>Set usage limit per user</li>
<li>Set minimum spend amount</li>
<li>Set maximum spend amount</li>
<li>Create coupons for individual use only</li>
<li>Create free shipping coupons</li>
<li>Exclude sale items</li>
</ul>

Auto Coupons for WooCommerce

Generate unique coupon codes for Woocommerce automatically.

cristiweb2

The sale price of the product in your cart is being replaced by the regular price if a coupon is applied.
This way, if you give your customers a 50% off coupon, they will get a better deal with the coupon rather 
than buying a product that is on sale for let’s say 20% off.
In Woocommerce, by default, if you have a product that is on sale with 20% discount and the user has a 50% off coupon, 
the 50% discount will be calculated from the on sale price, which is 20% off. 
This plugin is making that the coupon discount is actually calculated from the regular price.
It works for any kind of coupons and any kind of products you have in your Woocommerce store.
<h3>Example</h3>
See how the plugin works here: http://tempwoo7.rogeek.com/ 
Add the on sale product in cart, apply the coupon named “50off”.

Coupon overwrite sale price in cart Woocommerce

The sale price of the product in your cart is being replaced by the regular price if a coupon is applied.

Auto Coupons for WooCommerce vs Coupon overwrite sale price in cart Woocommerce