I would like to request that Test SPP be added to Portableapps.com. It is a tool that tests the signal processing power of your CPU. It is free and the source is available on the page.
You know what? This app needs some love. I'll see if I can improve its range at all, i.e. - >48000 Hz or below 44100 Hz, and check in when I know more about what's going on.