Meludia - Listening exercises and to sharpen your ear and music theory skills
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
GNU Solfege - GNU Solfege is free music education software.
Rakarrack - Rakarrack is a richly featured multi-effects processor emulating a guitar effects pedalboard.
Perfect Ear - A simple yet advanced application for improving your solfege skills.
ToneLib GFX - The perfect custom tone with a complete guitar studio in your computer