ChordU - Extracts chords from any song, integrated YouTube.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Tune Transcriber - Learn and transcribe music for free from your web browser (no install needed).
GNUitar - GNUitar is guitar effects software that allows you to use your PC as guitar processor.
Amazing Slow Downer - !A slow down music software for Mac and Windows computers - Amazing Slow Downer
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.