Stochas sequencer

Advanced Gtk+ Sequencer

Portable Impulse Tracker clone

FamiStudio NES Music Editor

MIDI Sequencer and Notation Editor with Audio Support

Digital Audio Workstation

Fast Tracker II inspired music tracker

Perform live DJ mixes

Helio, free and cross-platform lightweight music sequencer

Create, play and print beautiful sheet music

Modern music production and performance

Digital Audio Workstation for prototyping

An Audio/MIDI multi-track sequencer