Helio, free and cross-platform lightweight music sequencer

Portable Impulse Tracker clone

Advanced Gtk+ Sequencer

Create, play and print beautiful sheet music

Perform live DJ mixes

Fast Tracker II inspired music tracker

Digital Audio Workstation

Modern music production and performance

FamiStudio NES Music Editor

MIDI Sequencer and Notation Editor with Audio Support

Digital Audio Workstation for prototyping

Stochas sequencer

An Audio/MIDI multi-track sequencer