https://www.govinfo.gov/ 

This site provides free online access to official publications from all three branches of the Federal Government and allows you to:

• Search for documents and publications using advanced search capabilities and the ability to refine and narrow your search for quick access to the information you need.
• Browse for documents and publications alphabetically, by category, by Congressional committee, and by date (Government author coming soon!).
• Access metadata about documents and publications in standard XML formats.
• Download documents and publications in multiple file formats as a single file or content and metadata packaged together in a compressed file.

This Site Is:

• A Content Management System- GPO provides free online access to official Federal Government publications and securely controls digital content throughout its lifecycle to ensure content integrity and authenticity.
• A Preservation Repository- GPO's repository follows archival system standards and guarantees long-term preservation and access to digital Government content.
• An Advanced Search Engine- GPO combines modern search technology with extensive metadata creation to ensure the highest quality search experience.

Benefits:

• Access is free.
• About 50 different collections of Federal Government information are available.
• Easy to use.
• Offers authentic, digitally signed PDF documents.
• Information is preserved for permanent public access.
• Search multiple publications at once.
• Conduct complex searches.
• Narrow, sort, and filter search results.
• Access documents in multiple file formats.
• Access metadata in standard XML formats.
• Browse alphabetically, by category, by date, by Congressional Committee, and by author.