The RIdIM database indexes images depicting music-making, instruments, people in music history, and other music-related subjects. Many, but not all, of the records are linked to digital images.
NMM's "collections...include more than 15,000 American, European, and non-Western instruments from virtually all cultures and historical periods." Virtual collections may be browsed by instrument family, with non-Western instruments clearly identified, and include images as well as extensive descriptions.
A digital library of more than 3 million images across a variety of subjects, contributed by museums, artist estates, and a variety of institutions. As of 2024, Artstor is hosted on the JSTOR platform.