Letter: Q
- qarecord - Recorder for ALSA and Jack
- qjackctl - Qt based JACK control application
- qmidiarp - Midi Arpegiator
- qmidicontrol - Virtual Midi Fader Box
- qmidiroute - MIDI router and filter utility
- qsampler - LinuxSampler GUI front-end
- qtractor - Audio/MIDI multi-track sequencer
- qwt - Qt Widgets for Technical applications (Qwt)
- qwt-devel - Qt Widgets for Technical applications (Qwt)