Proxi is a free utility from Griffin Technology for Mac OS X. It allows the assignment of automated events called "tasks" to a variety of "triggers" such as hotkeys, email, i Tunes, RSS feeds, as well as hardware available from Griffin such as the Power Mate, Air Click or radio SHARK. These tasks can do such things as display messages on the computer screen, play a sound, write to a file, execute an Apple Script, control i Tunes or i Chat.