Below is a listing of the the Cabinet level executive agencies of the US Federal government and links to their pages.
United States Department of Agriculture (USDA)
Department of Commerce (DOC)
Department of Defense (DOD)
Department of Education (ED)
Department of Energy (DOE)
Department of Health and Human Services(HHS)
Department of Homeland Security (DHS)
Department of Housing and Urban Development (HUD)
Department of the Interior (DOI)
Department of Justice (DOJ)
Department of Labor (DOL)
Department of State (DOS)
Department of Transportation (DOT)
Department of the Treasury
Department of Veterans Affairs (VA)