A freely available, open source Windows application that lets almost anyone use their computer to do stuff automatically across all their devices. Just select an event (e.g. your favorite stock hit a trigger value, a change in the weather, say something to your Kinect, etc.) and then select a reaction (e.g. advance a PowerPoint slide, turn on a lamp, start playing a movie, etc.), and within seconds, you have a connection running.
For those who uses windows phone for browsing