Mixxx allows DJs to mix music live with a clean, simple interface. Futhermore, Mixxx has a number of key features to help DJs in the mix: Beat estimation, parallel visual displays, and support for various DJ hardware controllers.

Features:

• Beat estimation: Mixxx estimates the BPM of each song to help you beat match.
• Pitch independent time stretch: Adjust the tempo of your tracks without changing their pitch.
• Hardware support: Control Mixxx with your favorite MIDI devices and hardware like the Griffin Powermate.
• Waveform summary displays: Visually see the dynamics of a track, just like with vinyl.
• Completely Free: Mixxx was designed by DJs, for DJs, and is distributed freely under the GPL.

What's New in version 1.7.0:

Improved MIDI device support:

• MIDI learning wizard
• MIDI mapping editor
• Upgraded, faster mapping system
• MIDI output now fully supported on Windows, OS X, and Linux.
• QtScript/JavaScript-based MIDI Scripting Environment - Script complex behaviour for your MIDI controller!
• Added full support for the Stanton SCS.3d and SCS.1m on all platforms.
• Hercules MK2 and RMX improvements
• Added Mixman DM2 mappings for Linux and OS X.

Vinyl Control:

• Scratching responsiveness improved, with needle-skip prevention option added.
• Signal quality indicators added to vinyl control preferences.
• Improved support for soundcards with multiple stereo inputs

Convenience features:

• The default skin is now widescreen, and fits nicely on netbook sized screens.
• Stereo master VU meter added.
• Cue points are now saved in the library for each track, with "auto-recall" cue option added to preferences.
• Support for more platforms: 64-Bit Windows and a Universal OS X package for 10.4+!
• Over 100 bug fixes and more!