Smallpay offers the Merchant the possibility of payments in installments on any purchase and to charge monthly each installment on the card of his client. It is possible to do this both for the operators of physical stores that access their account with Log-in and password, and for the owners of online shops who have downloaded the plugin and have activated it on their e-commerce site. All merchant's customers will only have to enter their credit card number in the check-out page for payment of the first installment; the installments following the first one will be debited automatically, on the same card, on the 5th of each month until the current installments are canceled

Connect AutomatorWP with Digimember

This plugin is both suitable for one-time donations and for periodic payments. All payment methods of Mollie are integrated into the plugin.

WooCommerce invoice pdf generation for recurring / non-recurring orders. incl. invoice submission

End subscription payments after a certain number of payments

A calendar plugin supporting multiple calendars, recurring events, and several different widgets / shortcodes. More info at http://calendar-plugin.com

Create registration forms with payment methods of Mollie. One-time and recurring payments are possible.

Qualpay for Gravity Forms. Add credit card payments to your custom gravity forms.

Connect AutomatorWP with MemberPress

Paypal Standard Gateway for Ninja Forms

Add a unique piece of text or code to each gravity form from a predefined list. The plugin keeps track of which have been used and will only include unused items.

Provides an all-in-one registration point for subscribers to your blog. Uses Paypal API and recurring billing.

Payment Processing for Social Media Networks

Paywhirl lets you accept subscription payments on your Wordpress site.

A plugin for recycling posts or build recurring events and display the post content for a period.

Convert WooCommerce simple products(physical or downloadable/virtual) to subscription products and allow recurring payments

Attention: PHP version and WordPress version may have compatibility issues. For example, WordPress 5.4 may not match PHP 8. Check this website for details: https://make.wordpress.org/core/handbook/references/php-compatibility-and-wordpress-versions/

SecuraCart is a revolutionary payment plugin that empowers you to easily collect recurring and one-time payments on your WordPress site with Stripe.

Smart Countdown FX displays a responsive animated countdown. Supports years and months display and recurring events

Some additional queries for Gravity Forms like getting recurring payment notifications