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See the following -

How Open Source Can Solve Silicon Valley's Engineering Crisis

Matt Asay | TechRepublic | July 15, 2014

Silicon Valley may think itself the center of the technology universe, but 76% of open-source development happens elsewhere, a rich talent pool for engineer-hungry startups...

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Open Source Enables High-volume Searches

Stacy Collett | Computerworld | May 7, 2012

Twitter, Facebook, the Library of Congress -- all of these institutions have mind-numbing amounts of structured and unstructured data that must be indexed and searched quickly...So it's not surprising that such institutions would venture into the seemingly untamed world of open-source search applications, not just for the cost savings, but also for the ability to customize and modify applications quickly...But what about other enterprise users?  Read More »