Lists a number of links for freely-available online sources in music, theatre, and dance.
Lists numerous sites arranged by time period.
A metasite under the auspices of the School of Music at Indiana University – Bloomington, one the the country's premier music conservatories. Provides hundreds of links under the following general headings: individual musicians (all genres) and popular groups, composers and composition, groups and ensembles (except popular), other sites related to performance, genres and types of music, research and study, journals and magazines, commercial world of music, general and miscellaneous.
An excellent metasite of scholarly and popular Internet sources.