> We all rely on open source tools, but lately they're coming exclusively from large companies that can afford to develop it.

Do you have any evidence to support this?

In the age of GitHub and social coding I would have thought that open source is more individuals, and less corporate (percentage-wise) than ever before.

P.S. I work for my self and open source a fair bit. I tend to open source libraries rather than products, which is true for most companies. Facebook open source React, not Facebook.