Mixxx - The most powerful free DJ software in the world.
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.
Traktor Pro - Flagship DJ software with four decks and a stunning range of creative features for maximum freedom in DJing.
Serato DJ - Serato DJ is award winning, digital DJing software used by professionals across the globe.