You can also look up for these other topics:
Framework
Coding Standards
Boilerplate
CMS
Tool
Security
Hacktoberfest
Open Source Invoicing Solution for Individuals & Businesses
crater-invoiceAlipay driver for the Omnipay PHP payment processing library
lokielsePayum offers everything you need to work with payments. From simplest use cases to very advanced ones.
Payum:credit_card: :package: :moneybag: Laravel 6, 7, 8, 9 and 10 Package for Paystack
unicodeveloper