ActiveBass
Free bass guitar lessons with tablature and playback. with olga tab search, composition tools, resources, accessory and sheet music reviews, scales, lines, and more!
http://www.activebass.com
CyberfretBass.com
Free online electric bass lessons using audio and video. this site also features a tablature section and links to many bass and music resources.
http://www.cyberfretbass.com
Good Ear
This free ear training site helps you to develop good ears.
exercises: intervals, scales, chords,...
http://www.good-ear.com
Philip Baumgarten
Philip Baumgarten
http://www.baumgarten.nl