Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
GNUitar - GNUitar is guitar effects software that allows you to use your PC as guitar processor.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
GarageBand - GarageBand is a fully equipped music creation studio for Mac
go-dsp-guitar - A cross-platform multichannel multi-effects processor for electric guitars and other instruments.