Folklorist is a database of folk songs that aggregates data from The Traditional Ballad Index and The Digital Tradition databases. It is coded in Python on the Google App Engine framework and will be made open-source just as soon as I get around to it.
Folklorist by Casey Dwyer is licensed under a Creative Commons Attribution 3.0 United States License.
The Traditional Ballad Index is copyright ©2008 by Robert B. Waltz and David G. Engle.
The Digital Tradition is copyright The Mudcat Cafe.