VISUALZ is described as 'Real-time audio-responsive visuals for DJs'. There are four alternatives to VISUALZ for Windows, Mac and FL Studio. The best alternative is Magic Music Visuals. It's not free, so if you're looking for a free alternative, you could try VSXu Ultra Artiste or VJmachine 2.0.
VSXu Ultra Artiste lets you create stunning open GL based audio reactive visuals. Its unique modular interface gives you drag and drop functionality gives you access to dozens of modules that allow easy compositing of presets that can be played in VSXu player.
3D R2R music visualizer and music video creator software. Make a VJ show like a PRO. Create a unique tight symbiosis of sound and video for your party or YouTube. Fully automated with high end 3D real time scenarios, videos and pictures in Full HD.