SoundSpectrum's G-Force is a killer music visualization plug-in for iTunes that features fast anti-aliased effects, and millions of possible visual combinations that move to your music. G-Force is highly superior to Apple's included iTunes visualizer and is the kind of plug-in that, once used, you can't live without.

The free version of G-Force allows you to see visuals based on Sound Spectrum's advanced mathematical engine with millions of visual effects. You can even add your own visuals.

The upgraded Mac versions have just been updated and now include a toolbar that lets you control/customize many visual effects, and also the V-Bar, which is a cool strip which you can place on any desktop edge or different monitor and have going while you work in other apps.

Specifically G-Force Gold (US$20) adds the following features:

- Toolbar for full control and customization
- V-Bar: watch G-Force while working in other apps
- Exclusive visual effects
- Album cover art and track titles
- One year of free updates

Or buck-up to G-Force Platinum (US$30) to see G-Force at its best. Platinum includes the above, plus:

- G-Force Screen Saver
- Support for multiple media players
- Standalone: visualize CDs, Internet radio, microphone, etc.