Strictly, Media Servers are hardware and software to manipulate and run media (audio, video, still images) which can be remote controlled by lighting consoles. But then, the Media Servers listed here are usually controlled like any other intelligent fixture via DMX/Art-Net/sACN: you patch them and set their attributes. Hence, this is only a list of media servers and media control software which are available to standard control mechanisms. Most of those have various control inputs, i.e. react to Art-Net, MIDI and timecode. Details are available in the respective manual.