The Google Checkout module for osCommerce allows shop owners using osCommerce to offer Google Checkout as an alternate checkout method. This addon provides Level 2 integration of Google Checkout with osCommerce. This addon includes following features of Google checkout.
1. Posting shopping carts to Google Checkout
2. Shipping support (Currently, flat rates, item rates and table rates are supported)
3. Tax support
4. User and order updates within osCommerce
5. Order processing using osCommerce Admin UI