PBS
Pbs: Accordion Dreams
A very detailed site on the history and culture of the accordion. You'll find brief biographies on talented accordion players, a timeline, fun facts, and more!
Other
Gateshead Council: Farne: Folk Archive Resource North East
This site is from a British project that has collected recordings of traditional Northumbrian folk music. In addition to the the music itself, you'll find plenty of information on instruments, types of folk music, composers and...
PBS
Classics for Kids: Musical Instruments
An A-to-Z directory of all the instruments and tools of the orchestra. Each entry includes a description, a picture, and a sound sample.