P-Chord (Piano Chord)
Asoft
Piano Companion: 钢琴和弦和规模
Songtive
Cifras
leobrasil
Chord Tracker
Yamaha Corporation
G-Chord (Guitar Chord)
Chord Analyser (Chord Finder)
Pragmatic apps
U-Chord (Ukulele Chord)
Chord Library
Terence M
Chord Progression
GleickApps
吉他锁
tukangkibul