One of the great things about open source software is that it gives you the opportunity to scratch your own itch. A few years ago, we found this to be the case, when we developed our Dropshoppe: Easy Drop Shipper extension for Magento CE (Community Edition).
Dropshoppe: Easy Drop Shipper is a simple, easy to configure, extension that allows your Magento CE powered site to ship from multiple warehouses. This is a great solution, for anyone running an online business that sells products from more than one manufacturer and/or wholesaler.
Now, it’s been updated and is available for every version of Magento CE, from version 1.4.x to the very latest 1.9.x (currently 184.108.40.206).