Storetown Media is an e-commerce agency in Tornesch near Hamburg, Germany, building and running online stores since 2012. Our extensions for Magento Open Source and Adobe Commerce come out of that agency work: every module runs in a live store before it is packaged for the Marketplace. Four extensions are published here. Smart One Page Checkout replaces the native multi-step checkout with a single server-rendered page. B2B Registration & Approval adds a trade registration form with a real admin approval gate. Product Attachments & Downloads puts data sheets, manuals and certificates on any product, with server-side inline preview. Product & Order Surcharges carries cutting, finishing and handling fees as their own line item through cart, invoice and credit memo. All four run on Magento 2.4.4 and higher with PHP 8.1 and higher. They use declarative schema, plugins and observers instead of core rewrites, and a complete German translation ships with every module. Because we build for the German-speaking market, our modules cover what stores in Germany, Austria and Switzerland actually need: VAT identification capture, postcode data for Germany, Austria and Switzerland, and right-of-withdrawal handling. Alongside Magento we work with WooCommerce, Shopware and Shopify.