The Big Picture: FDLP and other Government Information Gateways, Networks and Digital Collections
GPO MetaLib - This is a federated search engine that searches multiple U.S. government databases, retrieving reports, articles, and citations while providing direct links to selected resources available online.
DATA.gov - Provides access to machine readable datasets and raw data.
Federal Agency Internet Sites/Directory (GPO/LSU)
The Big Picture: Gateways, Networks and Digital Collections (Non-Government) that include Government Information
LOCKSS Government Documents PLN (LOCKSS ALLIANCE)
Public.Resource.Org (Carl Malamud)