For those who need to leave their computer on but don't want to live with high electric bills, Shutdown Timer is your friend. Numerous options allow for auto-shutdown based on time, CPU load, memory usage, and network traffic. Users can also choose to have the computer automatically go to sleep, lock the user account, log off, hibernate, or turn off the screen.
This amount of control allows for some interesting, energy-saving possibilities. Students working on their animation projects can tell the PC to shut itself down once the CPU usage level drops after that lengthy render queue is done. Those downloading a large document can put the computer to sleep after network traffic drops to zero once the download is done.
For computer hardware enthusiasts, Shutdown Timer also works with CoreTemp. Users can tell the PC to shut itself down or go to sleep if the CPU reaches a certain temperature level.