Traktor Pro - Flagship DJ software with four decks and a stunning range of creative features for maximum freedom in DJing.
Serum - VST for FL Studio, Ableton Live, and many other VST supported DAWs. Heavily utilized in EDM.
Mixxx - The most powerful free DJ software in the world.
Korg Legacy Collection - Korg Legacy Collection is a suite of VST instruments that acts as an audio plugin software for integrating synthesizers and effects units into your digital audio workstation.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs
SynthMaster One - Powerful, universal wavetable synth with an intuitive workflow.