Fender Guitar Tuner

Simply Guitar - Learn Guitar

Tuner & Metronome

Ukulele by Yousician

Songsterr Guitar Tabs & Chords

Bass Guitar Note Trainer

Auto-Key | Music key detection

The Metronome by Soundbrenner

Justin Guitar Lessons & Songs

Tomplay Sheet Music

tonestro - Music Lessons

Radiogram - Radio App

IMSLP