G4FanControl is an useful Application that can be used to specify a certain minimum temperature limit that much be reached before the fans on a iBook/PowerBook G4 laptop start Up.
Default temperature limits will be restored by Mac OS X in the event of a reboot.
Changelog between 0.6 and 0.6.1
* Fixed issue with Leopard 10.5.3
Changelog between 0.5 and 0.6
* Now G4FanControl is fully compatible with Leopard!
* Retro-compatibility with Tiger
* Fixed incompatibility issues with JVM