31416k

SuiteMkt3k brings a modern style admin to WooCommerce sites and adds the marketing automation features online stores actually need:
<ul>
<li>Coupon campaigns with scheduling and calendar view.</li>
<li>Two display formats: top banner or popup, plus two coupon formats (classic and opt-in with a 2-step popup that captures Name, Email and Birth date).</li>
<li>Newsletter editor based on email-safe templates (no raw HTML required) with batched delivery, open tracking pixel and click redirector.</li>
<li>Subscription form builder via shortcode.</li>
<li>Abandoned cart capture from the checkout, manual or automatic recovery emails (with optional auto-generated WooCommerce discount coupon and unique link to restore the cart).</li>
<li>Full subscribers manager (search, filters, CSV export, edit/delete modals) with GDPR-compliant unsubscribe links.</li>
<li>Statistics dashboard powered by Chart.js (impressions, clicks, opens, conversions, revenue).</li>
<li>Own SMTP that only overrides for plugin emails (X-SuiteMkt3k header) so it never conflicts with general SMTP plugins.</li>
<li>Language selector (Spanish default + English), per-user override.</li>
<li>AES-256-GCM encryption for SMTP password, rate limiting on public endpoints, capability-based access control and prepared SQL everywhere.</li>
</ul>

SuiteMkt3k

Marketing suite for stores with coupons, newsletter, cart recovery, subscribers, analytics and built-in SMTP.

gr8nilay

This plugin create a custom post type for coupon code that includes Coupon Start / End date, Discount in Percentage / Cash. The coupons are listed with all details so you can easily manage it from listing page. You can easily use this plugin by customization by your own to enable coupon feature to your site.
How to Use: 
This is custom post type so you can apply all the hooks / customization that you do with any custom post type. Below are the variables which are used to store values of coupons so you just need to use meta values for the same.
Coupon Code = np_ccode__ccode 
Discount In ( % or $ ) = np_ccode__discount_in 
Discount Amount/Percent = np_ccode__amt_per 
Coupon Start Date = np_ccode__ccstart_date 
Coupon End Date = np_ccode__ccstart_date
You can use above meta keys into your site by your own to customize your site coupon feature.

Easy Coupon Code WP

Nice..!!

Provides you the custom post type with ready meta fields to enable coupon module to your site.

SuiteMkt3k vs Easy Coupon Code WP