The X.Org Foundation, a community-based foundation which took over X stewardship in 2004
The modern X.Org Foundation came into being when the body that oversaw X standards and published the official reference implementation joined forces with former XFree86 developers.
National Science Foundation | Ford Foundation | Rockefeller Foundation | John Simon Guggenheim Memorial Foundation | Electronic Frontier Foundation | Bill & Melinda Gates Foundation | New York Foundation for the Arts | Mozilla Foundation | Guggenheim Foundation | Alexander von Humboldt Foundation | OpenOffice.org | Andrew W. Mellon Foundation | Wikimedia Foundation | Apache Software Foundation | foundation | Make-A-Wish Foundation | John D. and Catherine T. MacArthur Foundation | Clinton Foundation | Open Software Foundation | Konex Foundation | Foundation series | Cystic Fibrosis Foundation | Carnegie Foundation | X.Org Server | Solomon R. Guggenheim Foundation | MoveOn.org | McKnight Foundation | Japan Foundation | Ingram Merrill Foundation | Helms Foundation College Basketball Player of the Year |