OpenCart
Open source PHP e-commerce platform for online stores

OpenCart is a free, open source e-commerce platform that helps merchants build and run an online store. It provides a storefront, an administrative dashboard, and an extension system to add payments, shipping, and other store functionality.
Key Features
- Product, category, manufacturer, and inventory management
- Orders, customers, and returns management with an admin dashboard
- Built-in marketing tools such as coupons and discounts
- Multi-store support from a single administration interface
- Extensions and themes ecosystem for payments, shipping, and customization
- Multi-language and multi-currency support for international selling
Use Cases
- Running a small-to-medium online retail store with a customizable storefront
- Managing multiple storefronts/brands from one back office
- Building a commerce site that relies on extensions for payment and shipping integrations
Limitations and Considerations
- Major/minor upgrades can break third-party extensions and themes and may require compatibility testing
- Store capabilities often depend on third-party modules, which vary in quality and maintenance
OpenCart is a mature, widely used shopping cart system with a straightforward administration experience and strong extensibility. It is a good fit for merchants who want a PHP-based platform with theming and an add-on driven approach to integrations.
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