Mac users interested in Fastandslow mac os 10.5 generally download:
This MenuExtra addition adds the ability to switch the Powerbook/iBook CPU/iMac G5 processor performance (in the Energy Saver settings) from the menubar. You can select between "fast", "slow" and "Automatic" (if your computer supports this setting). It is useful for example when your Mac becomes too hot and the fan starts.
