osCommerce

osCommerce is one of the oldest open-source e-commerce platforms, originally released in 2000 for building online stores. It provides basic e-commerce functionality including product catalogs, shopping cart, and checkout processes. The platform supports multiple languages, currencies, and payment gateways. osCommerce has a modular architecture with add-ons for extending functionality. It includes basic admin tools for managing products, orders, and customers. While widely used in the early 2000s, osCommerce has largely been superseded by modern platforms like WooCommerce, Magento, and Shopify. It's still maintained and used by some legacy stores and businesses in developing markets.