Piezo is described as 'makes it a snap to record audio on your Mac. With just a few clicks, you can record audio from any application, or from audio input devices like microphones' and is an app in the Audio & Music category. There are more than 10 alternatives to Piezo for a variety of platforms, including Windows, Mac, Linux, BSD and PortableApps.com. The best alternative is Audacity, which is both free and Open Source. Other great apps like Piezo are Audio Hijack (Freemium), SoundTap (Freemium), Audio Record Wizard (Paid) and Moo0 Audio Recorder (Free Personal).