FME OnePage Checkout Magento Extension
Demo: https://www.fmeextensions.com/one-step-checkout.html
OneStep Checkout Extension by FME reduce the Magento 6 checkout steps to a single step in a single page. Simplify the checkout process to reduce cart abandonment and improve conversion rate. This Magento One Page Checkout extension provides an easiest way for your customers to complete their orders on a single page.