Khan Academy is a non-profit educational organization created in 2006 by educator Salman Khan to provide “a free, world-class education for anyone, anywhere”. The organization produces micro lectures in the form of YouTube videos.
A free online music school!
A community-built library of public domain sheet music. Extensive collection of original scores scanned to PDF.
These TED Talks — from maestros, musical virtuosos and the occasional robot — take you into the world of creating and conducting music.
Web site dedicated to the study of Music Theory. Articles, reference, interactive exercises.
Includes introductory and intermediate music theory lessons, ear trainers, and books.