Virtual MIDI Piano Keyboard – VMPK
Virtual MIDI Piano Keyboard is a free and open source MIDI events generator and receiver for linux, Windows and MacOS. In this software you can use the computer’s mouse and keyboard to play MIDI notes. It is based on Qt5 and Drumstick RT frameworks. You can also map your alphanumeric keyboard with VMPK. It also comes with spanish, german and french keyboard layouts.