Oxford Art Online - access to Grove Art, Oxford Companion to Western Art, Encyclopedia of Aesthetics, and Concise Oxford Dictionary of Art.
Oxford Music Online - access to Oxford Dictionary of Music, Grove Music, and Oxford Companion to Music.
Readers' Guide Full Text - contains indexing and abstracting of popular general-interest periodicals, plus the full text of selected periodicals.
ARTstor - "nonprofit resource that provides 1.5 million digital images in the arts, architecture, humanities, and sciences."
LibraryMusicSource.com - collection of over 300,000 sheets of music from over 35,000 works of Western Classical music; includes composers such as: Chopin, Schubert, Bach and Beethoven.
New York Times (Current) - full text access from the most recent edition to the past five years.