Amazon.com - Folk
Amazon.com's site is comprehensive. A good place to shop.

Andy's Front Hall
A folk institution, Andy's Front Hall has been selling mail order since 1973. Their catalog is now online, though online transactions are still to come. Enjoy.

Barnes & Noble - Folk and Blues
Barnes & Noble is a major player online.

CD Baby - Folk
CD Baby sells music by independent artists and labels.

CD Now - Folk/Blues
One of the big online merchants. You can also search by artist.

eBay
eBay needs no introduction. It's the web's biggest marketplace for musical equipment, instruments and recordings. If you don't mind used, here's a huge source with an excellent track record.

eFolkmusic.com Best of the Net
Fine selection of folk/acoustic CDs in all genres, plus timely selections of free MP3s by new and established artists. Great to browse.

Folk Web
Online CD store for independent folk and acoustic artists and labels. Offerings are reviewed selected - 2 minute Real Audio song samples offered.

Hootenanny Holler
A former folk DJ promotes the music of about 50 artists from traditional aned bluegrass to contemporary. Sound clips and decent prices.

Indie Grrl
An online CD store for female indie artists in a number of genres - generally pretty good quality.

Musician's Friend
An online store for instruments and audio equipment. Their retail outlets are called The Guitar Center.

Sam Ash
Sam Ash is a national retail chain - now with online shopping for instruments and audio equipment.

Sing Out!
Sing Out! publishes a number of excellent books, including the mother of all songbooks - essential for any campfire: Rise Up Singing. Plus, you support a great organization.

String This
Buy strings in bulk for about $2 per set. The same strings sold under major brand names.

Stagepass.com
Source for songbooks and other stuff - including downloads of lots of useful free music software.

Ultimate Band List
The Ultimate Band List is a very cool music site for all genres - with online buying plus a lot of info.