A nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual, educational content, and to providing the full content of these wiki-based projects to the public free of charge.
The Wikimedia Foundation operates some of the largest collaboratively edited reference projects in the world, including Wikipedia, a top-ten internet property.
The Wikimedia Foundation (WMF) headquartered in San Francisco, California, that operates many wikis. The foundation is mostly known for hosting Wikipedia, an Internet encyclopedia which ranks in the top-ten most-visited websites worldwide.
Coordinates
San Francisco, California
http://en.wikipedia.org/wiki/Wikimedia_Foundation