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aimeos/aimeos-core
Aimeos PHP e-commerce framework for ultra fast online shops, scalable marketplaces, complex B2B applications and #gigacommerce
Aimeos is a PHP e-commerce library — not a standalone shop, but a framework you embed into Laravel, Symfony, or your own stack. It handles the full commerce domain: catalog, cart, orders, pricing rules, subscriptions, coupons, stock, and B2B scenarios. Target is mid-to-large shops that need more control than WooCommerce but don't want to build everything from scratch.
Genuinely modular — you pick the frontend (Laravel, Symfony, TYPO3, or custom), the core stays the same, so you're not locked into a CMS. The domain model is thorough: subscriptions, supplier management, configurable products, and multi-locale/multi-currency are all first-class, not bolted on. i18n coverage is unusually wide — 30+ languages with separate translation files for country names, currencies, and UI strings. Test coverage badge shows it's actually maintained and not just a README project.
This repo is the core library alone — you also need an integration package, the admin UI package, and a frontend theme, which means four separate repos to track and keep in sync when upgrading. The configuration system is a sprawling PHP array tree (see config/mshop/*.php) that will take a day to understand before you can do anything non-standard. Documentation lives on aimeos.org, not in the repo, so you're dependent on a third-party site staying up and current. The 129 forks vs 4500 stars ratio is low, suggesting most people evaluate it but don't build on it — that's a signal worth taking seriously.