Lots of engines are available. And if you are thinking of the 120 sized models (around 72 inch wingspan) even more fall into this range.
Four strokes
YS 140DZ
YS 140L
YS120FZ
Two Strokes
OS140 RX
OS140 EFI
OS160 FX
OS160 FI
Webra 120
Webra 145
Mintor 140 - really new
Mintor 170 - really new
Randy