Mixxx - The most powerful free DJ software in the world.
Guitar Pro 7 - Create, play and share your tabs
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
OpenMPT - OpenMPT is a popular tracker software for Windows.