18 ways to differentiate open source products from upstream suppliers: 
In the first three parts of this series, I explored open source as a supply chain, what a product is, and what product managers do. In this fourth article, I’ll look at a plethora of methods to differentiate open source software products from their upstream open source projects.
read more: Opensource.com fatherlinux
Supporting Open Source.
Have you tried: Visiting Port Elizabeth?