Chord Progression
GleickApps
Scale, Chord Progressions
Raul Reyes
Cifras
leobrasil
Chord Tracker
Yamaha Corporation
G-Chord (Guitar Chord)
Asoft
Chord Analyser (Chord Finder)
Pragmatic apps
P-Chord (Piano Chord)
Chord Library
Terence M
U-Chord (Ukulele Chord)
吉他锁
tukangkibul