Flowkey - The easiest way to learn piano with your iPhone or iPad
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
alphaTab - alphaTab is a cross platform music notation and guitar tablature rendering library.
Guitartapp Chord Pro - Guitartapp Chord Pro is the world’s largest and popular music and audio app that allows you to throw away your songbooks and start jamming with this app.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
SongBook - SongBook is a music app that helps you to manage your song collections complete with lyrics and chords.