https://www.openpaymentsystem.com/
Open Payment System - The online payment system for credit control
open paymentfor creditsystemonlinecontrol
https://www.drupal.org/project/commerce_opp
Commerce Open Payment Platform | Drupal.org
Jun 20, 2024 - This module integrates ACI PAY.ON Payments Gateway (formerly known as "Open Payment Platform") with Drupal Commerce, integrating the COPYandPAY (also known as...
open paymentcommerceplatformdrupal
https://learning.sap.com/videos/configuring-notifications-in-open-payment-framework
Configuring Notifications in Open Payment Framework
configuring notificationsopen paymentframework
https://killbill.io/
Kill Bill | Open-source billing and payment platform
billing and paymentopen sourcekillplatform
https://hyperswitch.io/
Open Source Payment Orchestrator | Juspay Hyperswitch
Hyperswitch is an open-source global payments orchestrator that connects with multiple payment processors with a single API
open sourcepayment orchestratorjuspayhyperswitch
https://opencryptopay.io/
Open CryptoPay - Free & Open Payment Standard for Everyone.
Open CryptoPay is an open license-free P2P payment standard for all blockchains and crypto assets and is also Bitcoin Lightning LNURL backward compatible.
opencryptopayfreepaymentstandard
https://open.feishu.cn/document/corehr-v1/basic-compensation/recurring_payment/batch_remove?lang=en-US
Batch delete recurring payment records - Server API - Feishu Open Platform
Feishu empowers enterprises with collaboration tools; Open Platform integrates systems, breaking barriers for efficient info exchange.
batch deleterecurring paymentserver apirecordsfeishu
https://ltec2023.com/2023/02/12/online-registration-and-payment-is-open/
Online Registration and Payment is Open - LTEC 2023
registration and paymentonlineopenltec