Hundreds of old-time field recordings and 78RPM records. Features recording that go along with several books of sheet music.
Digital Library of Appalachia
This is a great site with thousands of field recordings of traditional music from all over the Appalachian region.
Junior Appalachian Musicians Homepage
Official homepage for the JAM program.
The Honking Duck Home Page
Another excellent site for old recordings. These are all old 78RPM records from 1920's through 1940's.