Not that I know of, but technically doable since all it needs is transmitting through infrared the corresponding signal variants according to different brands. By modifying the source one could for example set all TVs to maximum volume, or tune them to channel 666, or even give different commands to different brands as they share the same IR codes.

Mitch open sourced the entirety of tv b gone from the start. It's pretty easy to make this tv-come-on. The tvbg is just a ir driver and:

    foreach offcode in list_of_offcodes:
        transmit(offcode)

You need the TV-B-ON version