Advantages of open source: Revisited

I feel that is important for me to further analyze the benefits of open source software. In a previous post, I highlighted the cost-savings of open source and did not mention any of the other advantages that it provides. This post should provide a more balanced view of open source and the intrinsic benefits that free software provides.

Low Cost

This is the benefit that I focused on in my previous post. Cost is the most obvious benefit when people compare it to proprietary software. How does open source achieve this low cost?