http://www.opencart.com/index.php?route ... on_id=7382
Many would ask why I made this when there's already one? Here's my reply to it: I had a client that asked me to purchase One Page Checkout for him awhile ago. Well, he complained of the many errors that kept appearing in the error logs. So I decided, it's time to improve the standard of the extensions out there It may look alike to One Page Checkout, but it has improved error handling, reduced ajax callbacks, and what most will love, removed unnecessary fields like company ID etcQuick checkout enhances your customers’ checkout experiences. It removes unnecessary fields to allow quicker checkout and have the checkout in one single page, instead of the default multiple steps. Best of all, no default files are replaced!
Features:
• Removes unnecessary fields
• Compatible with all payment methods
• Compatible with all shipping methods
• Easy to use one page checkout
• Efficient checkout with lesser fields
• Improved usability, better error handling than One Page Checkout
Code written from scratch (other than some parts of it which uses the default checkout files). Currently it doesn't support shoppica theme since I don't have that theme on hand, and I don't like that nasty theme