Government has very few true open source open data options, and DKAN is one of them.
For those passionate about cultivating a more sustainable, open source oriented open data community, the first DKAN Open Data Summit is scheduled for August 1, 2017, in Washington, D.C.
DKAN Open Data Summit will be held in tandem with Drupal GovCon, and you must register for the latter to attend the former.
DKAN currently powers several federal, state and local government open data platforms, including the U.S. Department of Health and Human Services, the state of California, Louisville and many others.
(Note: CivicActions is the lead organizer of DKAN Open Data Summit. See disclosures.)