Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Flowkey - The easiest way to learn piano with your iPhone or iPad
AmpliTube - Guitar Amp & FX modeling plug-in • Amp, Stomp, Cabinet + Mic, Rack FX modeling
Yousician - Learn to play music at home, at your own pace
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.