Internet Archive Has a Free Music Widget. The widget is available on Widgetbox here
You can do some customizing of width, height, theme, etc. However the content remains the same; new music as it’s added to the archive.
When I took a look at the widget it included music from bands including The Grateful Dead, Donna the Buffalo, Cracker, and Drive-By Truckers. Now if it had a built in player that would be even more awesome, but alas….
The widget was created by Jeff Kaplan (or at least some user calling themselves “JeffKaplan”) of the Internet Archive. This is the only widget available from this user. Will be perhaps be seeing more on the way?
By the way, if you like this widget, don’t forget to check out Dewey Music, which I covered last month in ResearchBuzz. Great stuff.