FL Studio, GarageBand, Ableton Live, Adobe Audition, Logic Pro, LMMS, Reaper, Cakewalk, Ardour, OpenMPT, Bitwig Studio, SampleTank, Sequencer64, Amadeus Pro, MidSequer, Skale Tracker, Free Audio Dub, Bosca Ceoil, AudioTool, Hydrogen, Open Octave, Seq24, WaveShop, Music Maker Studio, Traverso DAW, AudioMulch, mpTrim, Zrythm, DarkWave Studio, MAGIX MP3 Deluxe, SVArTracker, FileLab Audio Editor are some alternatives to Qtractor.