Remotely start a computer using its (properly configured) network card, if routing permits. Easiest within a LAN, at Cornell. https://itunes.apple.com/app/depicus-wake-on-lan/id399848364?mt=8
- Software creator also has non-Apple-focuses solutions: http://www.depicus.com/wake-on-lan/
Lower-powered RasberryPi-based WOL Forwarder