ZGameEditor Visualizer is described as 'plugin variant of ZGameEditor engine built for audio visualization and bundled with FLStudio'. There are more than 25 alternatives to ZGameEditor Visualizer for a variety of platforms, including Windows, Android, iPhone, Steam and Winamp. The best alternative is MilkDrop, which is both free and Open Source. Other great apps like ZGameEditor Visualizer are projectM (Freemium, Open Source), Magic Music Visuals (Paid), Avee Player (Freemium) and VSXu Ultra Artiste (Free, Open Source).
R2/Extreme is a plugin (by Gordon Williams) for the WinAmp music player. It produces animated 3D graphics in real-time that twist and turn with the music. Now used in nightclubs, parties, and even (apparently) a canadian stripclub, R2 has become known for its fast, fluid visuals.
NestDrop allows you to perform with high-resolution high-fps visuals which react in realtime to the music and then broadcasts the video via Spout. Since the Milkdrop engine is at the core you can easily bring in your own Milkdrop presets.
Powelus's Audio Visualizer allows any person to customize visualizer to their own experience. The software has the capability to load local MP3 files and display audio spectrum during real-time playback.