Mixxx - The most powerful free DJ software in the world.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Traktor Pro - Flagship DJ software with four decks and a stunning range of creative features for maximum freedom in DJing.
GNUitar - GNUitar is guitar effects software that allows you to use your PC as guitar processor.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
Ampire - State Space Modeled guitar amp/cab/stompbox simulator.