Open Government Partnership: Third Open Government National Action Plan for the United States of America [open pdf - 787KB]
"Open government has long been a cornerstone of democracy in the United States. Principles of transparency and an accountable, responsive government are embedded in Federal law and the U.S. Constitution, and the United States was one of the first countries in the world to adopt an access to information law - the 1966 Freedom of Information Act. Building on this longstanding tradition, President Obama early in his Administration launched the Open Government Initiative that has catalyzed significant steps to open up the Federal government, make government more efficient, and provide citizens with unprecedented access to government information. The United States reached another important open government milestone in 2014 when President Obama signed legislation passed unanimously by the U.S. Congress, requiring Federal agencies to publish their spending data according to clear standards that will help improve the quality of government information, help inform government decisions, and make government work more efficiently for the American people."
United States, White House: http://www.whitehouse.gov/