Helio Workstation - Cross-platform lightweight speed-painting tool for creating music.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
JJazzLab - Fed up with boring backing tracks ? Try JJazzLab!
Guitar Pro 7 - Create, play and share your tabs
NtEd - Music Score Notation editor.
Band-in-a-Box - Band-in-a-Box is so easy to use!