Some DJ mixers that are free to download are Mixx and VirtualDJ 8. Mixx is available for Windows, Mac OSX version 10.5 and above, and Ubuntu. The two scratchable desks in this software support drag-and-drop functionality for a wide range of audio file formats including MP3, WAVE, FLAC and AIFF.
VirtualDJ 8 is available for Windows XP and above and Mac OSX version 10.7 above. The program lets users mix two songs, adjust their speed and scratch them for special effects. Users can also organize their audio file collection and mix songs from playlists. In addition, this software comes with a wide selection of effects including echo, flanger and loop-roll.