Just a quick word to announce we released a new app called ProjectorManager. It's made to take control of video projectors using the PJLink standard that is implemented on most of the network enabled video projectors.
ProjectorManager implements the complete PJLink protocol (power on/off, shutter/audio on/off, source change, status and error reporting) and can control an unlimited amount of projectors at the same time.
For more infos: http://projectormanager.sigmasix.ch
On the todo list:
DMX, MIDI, OSC control