Guitar Pro 7 - Create, play and share your tabs
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
TuxGuitar - A Multitrack tablature editor and player.
music21 - Music21 is a Python-based toolkit for computer-aided musicology.
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.
Harmony Assistant - Harmony Assistant is an unbeatable software for computer-assisted music composition and editing.