Virtual MIDI Piano Keyboard is a MIDI events generator and receiver. It doesn't produce any sound by itself, but can be used to drive a MIDI synthesizer (either hardware or software, internal or external). You can use the computer's keyboard to play MIDI notes, and also the mouse. You can use the Virtual MIDI Piano Keyboard to display the played MIDI notes from another instrument or MIDI file player.
Copyright (C) 2008-2018, Pedro López-Cabanillas and others
License: GPL v3
More info
http://vmpk.sourceforge.net
Downloads for Windows, macOS, Linux and C++ sources:
http://sourceforge.net/projects/vmpk/files/0.7.0