I agree. Recently we have started the project where we are trying to allow musicians to experiment with different chords & styles (http://www.songtive.com/songs

I agree. Recently we have started the project where we are trying to allow musicians to experiment with different chords & styles (http://www.songtive.com/songs/new http://www.songtive.com/songs/new) and displaying relative chords is one of upcoming features.