Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
MMA - “MMA—Musical MIDI Accompaniment” is an accompaniment generator.
Rakarrack - Rakarrack is a richly featured multi-effects processor emulating a guitar effects pedalboard.
Synfire - The comprehensive Music Prototyping Studio for professionals and enthusiasts.
ToneLib GFX - The perfect custom tone with a complete guitar studio in your computer