Chord player

play the chord :-)

Circle of Fifths (from Wiki)

Relative Minor is 3 semitone lower than the respective Major chord

CAGED system

key of a song

key finding 15 min after
listen to the song carefully->hum it->play the ballpark note on piano->eliminate those notes which come in the minor chord that puts that ballpark note at the end of that minor chord->after eliminating the other 2 notes you will have the key of the song. (ballpark note might be 3rd or 5th note in the original key).This is "minor chord test" 

chords

chord progression link

chord progression

4 chords

http://groups.google.com/group/subho_friends/web/pianochordchart.pdf

http://groups.google.com/group/subho_friends/web/UkeChart.pdf

http://groups.google.com/group/subho_friends/web/harpbook.pdf

http://groups.google.com/group/subho_friends/web/harmonica.pdf

http://groups.google.com/group/subho_friends/web/15-Guitar_Tabs_dup.pdf

music online classes

http://oyc.yale.edu/music/listening-to-music/content/class-sessions

Guitar Lessons online