Mixxx - The most powerful free DJ software in the world.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Zulu DJ Software - Zulu DJ Software is the best tool for singers and musicians.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
VJ6 - If blending music is your essential thought process, you might need to search somewhere else for your DJ blending software.
AmpliTube - Guitar Amp & FX modeling plug-in • Amp, Stomp, Cabinet + Mic, Rack FX modeling