Google – Find government-related Web sites through this powerful, precise search engine. The advanced search allows users to limit results to the .gov domain.
USA.gov – USA.gov, the official online “gateway” to government information, enables every citizen to learn about the federal government. State and Federal information is available through several links and search features.
Catalog of U.S. Government Publications – The Catalog of U.S. Government Publications contains records for documents disseminated by the Government Printing Office and other federal agencies. If a document is online, a link is provided.
MetaLib: GPO – Powerful search tool that allows users to search over 50 government databases with a single search.
Hathi Trust Digital Library – Contains over 13,000,000 volumes including many full-text government documents.