n-Track Studio Pro | DAW

Tomplay Sheet Music

Natural Metronome

GuitarTuna: Tuner,Chords,Tabs

Timbro - Guitar & Piano

Smart Pianist

Fender Guitar Tuner

Auto-Key | Music key detection

MuseScore: sheet music

IMSLP

Remixlive - Make Music & Beats

The Metronome by Soundbrenner

DRC - Polyphonic Synthesizer