World Wide PC Remote

wwPCRemote allows you to remotely control your PC using your iPhone. You can control devantech USB relays, which let you turn on and off lights in your house, open or close your garage door, hardware and software that react to UDP messaging, restarting and shutting down of your computer and other computers connected to yours over your network, and even turning on other computers connected to yours over your network. It supports customizable buttons and multiple commands per button with wwPCRemote (full version).