Check out Spark Shipping
HOW IT WORKS
Dashboard gives you a heads up view of your store and orders over time.
Details of all your orders can be viewed from here. You can also view your orders' fulfillment details such as which vendor it was sent to and how it was sent to that vendor (Email, FTP, CSV, XML, API, etc).
This is how you will connect Spark Shipping to your store - Add a new site here and away you go! Also, managing multiple sites is easy, add & delete new sites from here.
Keep track of all your vendors in a single location. Manually upload datafeeds or view progress of your automated uploads that are currently running.
View all the products in your store, manage linking products to vendors and edit products details from here.