Mixxx - The most powerful free DJ software in the world.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
Traktor Pro - Flagship DJ software with four decks and a stunning range of creative features for maximum freedom in DJing.
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.
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.
Cross DJ - Mix, scratch, sample, record: rock great parties with top-DJ features.