FluidSynth - FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications and has...
Yousician - Learn to play music at home, at your own pace
ZynAddSubFX - ZynAddSubFX is an open source software synthesizer for Linux, Mac OS X and Microsoft Windows.
Flowkey - The easiest way to learn piano with your iPhone or iPad
WhySynth - WhySynth is a versatile softsynth which operates as a plugin for the
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.