VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
ClubDJPro - ClubDJPro is the most responsive and simple-to-use DJ Software, for making heart pumping video and sound blend sessions.
Mixxx - The most powerful free DJ software in the world.
Mixmeister - Create custom party mixes, burn CDs, or add special effects to MP3s with this line of DJ software for the novice and pro. Offers free trials and user community.
DJ Mixer Soft - DJ Mixer Professional is the best DJ mixing software for Mac and Windows, Support audio, karaoke and video mixing, automatic DJ mixing, one-click beat-matching, etc.
FL Studio - Image-Line's FL Studio, now on it's 12th version, is a well-known music production suite and the most popular beat processor on the market, due no doubt to its longevity. Read more about FL Studio.