"Challenge.gov is an online challenge platform administered by the U.S. General Services Administration (GSA) in partnership with ChallengePost that empowers the U.S. Government and the public to bring the best ideas and top talent to bear on our nation’s most pressing challenges."

Ideas for Change in America is a crowd-sourcing competition that empowers citizens to identify and build momentum around a diverse range of ideas for addressing the challenges our country faces...Final round voting begins on March 1 and ends on March 12. The 10 most popular ideas will be presented to relevant members of the Obama Administration. from Change.org.

On the weekend of December 12-13th, we're holding an open, distributed, nationwide hackathon to develop open source applications to open government. from Sunlight Labs.

Open Source for America (OSFA) is an effort to raise awareness in the U.S. Federal Government about the benefits of open source software. We hope to encourage the government's utilization of open source software participation in open source software projects, and incorporation of open source community dynamics to enable transparency.

high value, machine readable datasets generated by the Executive Branch of the Federal Government.

community-moderated online town hall. from whitehouse.gov.