Mixxx is an open source DJ tool designed for both professional and amateur DJs alike.

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!