Qtractor, an audio/MIDI multi-track sequencer | https://qtractor.org | Latest release: 1.5.11 (end-of-year'25) 2025-12-30 | Git: https://github.com/rncbc/qtractor | Snapshots: https://www.rncbc.org/snapshots/#qtractor | Archive: https://www.rncbc.org/archive/#qtractor