Rosegarden

Rosegarden is a well-rounded audio and MIDI sequencer, score editor, and general-purpose music composition and editing environment.

Free Open Source Linux

Sekaiju

"Sekaiju" is a free, open source MIDI sequencer software for creating and editing MIDI data. This software enables you to create music with your MIDI modules or synthesizers. Sekaiju also can be used as a powerful MIDI editor.

Free Open Source Windows

staventabs

iOS and macOS notation and tablature editor with MIDI and MusicXML files support and chromatic scales analyze of the score.

Freemium Mac OS X iPhone iPad

Jazz++

Jazz++ is a MIDI sequencer/composer. Create your own music.

Free Open Source Windows Linux