What are some alternatives?
When comparing Mixxx and LMMS, 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.
Ardour - Record, edit, and mix on Linux, Mac OS X, and Windows.
Cross DJ - Mix, scratch, sample, record: rock great parties with top-DJ features.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
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.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.