The White House:Official site. Features a virtual historical tour, history of American presidents and their families, and selected exhibits of art in the White House.
President's Park (White House): National Park Service official site gives a history and visitor information.
White House Collection of American Crafts: Part of the National Museum of American Art
White House Historical Association: A nonprofit that helps conserve and interpret the White House. The site features virtual tours, history lesson plans, official White House Christmas ornaments, books, and gifts.
White House Museum: Presents an overview, grounds, residence, and east and west wings tour.