Chords and Scales for guitar and piano
Chord House has some good online features for guitar and piano players. The site has 2 guitar rooms, easy room and advance room for guitar players to play around with the chords. Guitar players check the sound by changing the chords. You can even save the chords setting and email or print it out. That goes the same as the piano room. Beside that there is a link on the site where you can check out lots of universal guitar tabs.