http://www.oldtimeherald.org/ (The old time herald is one of my favorite magazines for great articles on real old time music history past and present)
http://www.singout.org/ (American & World Folk Music fill the pages of this fine magazine. Originally started by Pete Seeger back in the late 50’s/60’s this magazine has a rich and varied history.)
http://www.livingblues.com/ (America’s very first Blues magazine! Covering traditional and contemporary blues in America with an emphasis on its African American purveyors, this magazine is always filled with top notch writing, reviews, news, and lore.)
http://www.bluesrevue.com/ (My second favorite blues history magazine! Leans more towards electric blues, but still a good magazine going strong for a number of years)
http://store.dirtylinen.com/ (The magazine of Folk & World Music!)
http://digital.library.ucla.edu/sheetmusic/ If you are into old music, this is a great resource for old sheet music pre-1922 public domain material posted by the UCLA-at Davis
http://www.ukuleleguild.org/index.php A guild dedicated to the preservation, perpetuation and continuation of all things ukulele worldwide.
MISCELLANEOUS MUSIC:
http://www.jugband.org/ (Find a Jug band near you! Keeping Jug Band History alive.)
http://www.folkalley.com/ (Get your iphone app and stream all folk, all the time from this great online radio program for lovers of traditional and contemporary folk music)
http://www.folkways.si.edu/ (the source for America’s richest repository of traditional music, folk, blues, Yiddish and all things Moe Asch! Folkways was the label that released the incredibly influential Harry Smith Anthology also the home of Woody Guthrie, Pete Seeger, Josh White, Lead-belly, Sonny Terry, Cisco Houston, Mike Seeger, The New Lost City Ramblers and so many of my other heroes! This is real music people! Folkways records have and will remain some of my deepest musical influences. This is, as they say…music of the people, by the people, for the people!)
http://cylinders.library.ucsb.edu/ (Looking for old music? On the hunt for old tunes, the way they sounded so long ago? This trove of old time cylinders, digitized is the mother-lode of antiquity for anyone with a yen to hear the real deal.)
http://library.duke.edu/digitalcollections/hasm/ (Digital collection of rare old sheet music for download and viewing. If you are hunting for old tunes as I often do, this is sometimes the place to start!)