https://extensions.joomla.org/extension/content-cart/
Content Cart, by Joomline - Joomla Extension Directory
Content Cart - This extension allows you to organize a simple online store based on Joomla articles.
content cartjoomla extensionjoomlinedirectory
https://opensolution.org/home.html
Free shopping cart and content management system (CMS) - OpenSolution.org
Simple to use and easy to modify PHP scripts: Quick.Cart and Quick.Cms. Installation takes less than 5 minutes and it doesn't require MySQL.
content management systemfree shoppingcartcms