ZynAddSubFX
Mar 28, 2016 - v2.5.4.0Audio/Midi
amsynth
Jun 1, 2017 - v1.7.0.1Audio/Midi
Hydrogen
Jun 9, 2017 - v0.9.7.5Audio/Midi
Horgand
Unrated.
Dec 25, 2015 - v1.1.4.2Audio/Midi
QmidiNet
Unrated.
Dec 24, 2015 - v0.2.0.2Audio/Midi
LMMS
Apr 12, 2015 - v1.1.3.1Audio/Midi
ASeqView
Jun 4, 2013 - v0.2.8.01Audio/Midi
gmidimonitor
Jun 4, 2013 - v3.6.1.01Audio/Midi
QMidiArp
Nov 8, 2016 - v0.6.4.0Audio/Midi
Simple Sysexxer
Jun 4, 2013 - v0.3.0.01Audio/Midi