Mixxx is Free DJ software that gives you everything you need
An Audio/MIDI multi-track sequencer
An Editor for Roland JUNO ALPHA 1/ 2 and Roland MKS50
Tools to analyze the Lakh Clean Midi Dataset
Polymeter MIDI sequencer
psychedelic visual synthesizer color-organ style
Midi Translator - MainStage-style midi-mapper for Window
Package to use RockBand 3 Pro Drumkit and Guitar Hero drumkit via midi
Arduino micro based new sync devices for Gameboys
Pro-audio Linux appliance for musicians and show automation
Bulk extractor for Ensoniq-formatted disk images