Helio Workstation - Cross-platform lightweight speed-painting tool for creating music.
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.
OpenMPT - OpenMPT is a popular tracker software for Windows.
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.
Band-in-a-Box - Band-in-a-Box is so easy to use!