Jokosher - Jokosher is a simple and powerful multi-track studio.
MuseScore.org - Create, play back and print beautiful sheet music with free and easy to use music notation software MuseScore. For Windows, Mac and Linux.
Fission - Edit audio in minutes, not hours.
Guitar Pro 7 - Create, play and share your tabs
MusicBoard - Mb Launchpad is the first Linux launchpad.
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.