Using proprietary services to develop open source software: 
It is now pretty well accepted that open source is a superior way of producing software. Almost everyone is doing open source these days. In particular, the ability for users to look under the hood and make changes results in tools that are better adapted to their workflows. It reduces the cost and risk of finding yourself locked in with a vendor in an unbalanced relationship. It contributes to a virtuous circle of continuous improvement, blurring the lines between consumers and producers. It enables everyone to remix and invent new things. It adds up to the common human knowledge.
read more: Opensource.com Thierry Carrez
Supporting Open Source.
Have you tried: Sailing in Africa ?