The The Freer Gallery of Art and Arthur M. Sackler Gallery have released their entire collection of 40,000 Asian and American artworks online in 'Open F|S', a free public resource. The majority of pieces have never before been seen by the public. Over 90 percent of the images are high-resolution and without copyright restrictions for non-commercial use. They are the first Simsonian and the only Asian art museums to digitize and release their entire collections.
Freer|Sackler press release: http://www.asia.si.edu/press/2014/openfs.asp.