Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
keezy - A colorful soundboard. Play with music.
GNUitar - GNUitar is guitar effects software that allows you to use your PC as guitar processor.
Aftertouch - Aftertouch – 3D MIDI Controller created and published by Kevin Nelson.
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.