Art Journey
(Art):
http://library.advanced.org/3059/

National Gallery of Art (Online Art Gallery):
http://www.nga.gov/

Virtual Museums (Directory of Online Museums):
http://www.comlab.ox.ac.uk/archive/other/museums.html

Art Safari
(The Museum of Modern Art Collection):
http://artsafari.moma.org/

ArtMuseum.net
(Internet-based Art Museum Experience):
http://www.artmuseum.net/