Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Tonelib JAM - Create, edit, print and listen to tablature and guitar sheet music
go-dsp-guitar - A cross-platform multichannel multi-effects processor for electric guitars and other instruments.
Chordsheet Maker - Create chord sheets or lead sheets quick and easily from your iPad. Add rhythms, endings, segno, codas and all what's necessary for your musicians to know what's your music about. Transcription made easy!
Waves GTR - From Fender® to Marshall®, Mesa/Boogie® to Vox®, and more, Waves has captured...
Aria Maestosa - Aria Maestosa is an open-source (GPL) midi tracker/editor.