What are some alternatives?
When comparing Mixxx and Deckadance, you can also consider the following products
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.
Cross DJ - Mix, scratch, sample, record: rock great parties with top-DJ features.
Traktor Pro - Flagship DJ software with four decks and a stunning range of creative features for maximum freedom in DJing.
DJ Mixer Pro - 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.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
Pacemaker Editor - [You can still download last version of Pacemaker for Windows and Mac from Softonic: