Webgility (eCC)

Webgility is a leading Gold Certified QuickBooks developer, providing eCommerce integration solutions.  Its flagship product, eCC, integrates with online shopping cart platforms, QuickBooks, payment gateways and shipping processors to enable eCommerce merchants to maximize their order fulfillment and inventory management.  eCC works with all editions of QuickBooks and major shipping carriers and shopping carts, including X-Cart.

Here's a chart of the current eCC plans:

You can watch their demo below: