What is GNUitar?
GNUitar is guitar effects software that allows you to use your PC as guitar processor. It includes the following effects: wah-wah, sustain, distortion, reverberator, echo, delay, tremolo, vibrato, and chorus/flanger.
The project is no longer updated and the official website is no longer available. Last version, 0.3.2, released in May 2005, can be still downloaded from SourceForge