Connecticut: Yes on buzzer beaters, or not buzzer beaters. We needed it in a final last year. I believe that replay can also be used on game ending two, or three pointers.
I also believe that replay can be used in all state tournament games, but I'm not sure. Maybe RefCT can give us a confirmation, or denial, on that, and maybe he can also confirm, or deny, the two/three pointers.
https://www.youtube.com/watch?v=0t9U4dlQts4