Roots Music - Gateways

General folk

FROG: The Folk and Roots Online Guide: A rich collection of links to European folk music, and the rest of the world to a lesser extent. Also serves as an index to the online magazine FolkWorld.

Ar Bed Keltiek: Music, books, crafts.
Musictrad: Breton and other traditional French music resources: CDs, band information, live and broadcast events.

Chambers' Book of Days: Made online and searchable by the Greater Emmitsburg Area Historical Society, Maryland. For all those festivals which English singers and dancers sing and dance about.
English Folk and Traditional Music on the Internet: Amazing resource by Martin Nail. Comprehensive and well organized, including all aspects, from research to artists and festivals.

Mad for Trad: Rich site for traditional Irish music, including a shop, news, tours, festivals, artist information, a tune archive, and even jokes. Its special feature is tutorials in the form of instructional CDs.
Music in Scotland: Includes a CD store, Celtic music links, musician information pages, and promotional services for musicians and companies.
tradmusic.com: Rich and up to date news and reviews site for traditional music, with an emphasis on Scottish.