I don't know if there's much, but the Freesky Project 777 is pretty good. You'll have to find a good panel and soundset, and make sure you copy some of the txt from the original panel.cfg to the new panel.cfg because the xml animations won't exist if you don't. Project Airbus A380 is good, I recommend it with a Trent 500 pack on avsim and you can use an A340 panel. If you want a good MD-80, go with the SGA model along with Lonny Payne's panel, and Adam Murphy's sound pack. Other than that I would recommend the QW 757 which is payware. It is expensive, but it is BY FAR THE MOST REALISTIC 757 MODEL!