G'day CopterD,
I'll give it a go for you (as far as Australia goes),
Bristow 5 x S76A+, 5 x AS332L
CHC Australia 5 x AS332L / L1
Esso Australia 6 x S76C
Jayrow 2 x S76A, 2 x BK117
As far as I know, that's about the scene as far as current (IFR) offshore machines go, but CHC use B412 and S76 equipment as contracts require. There is a lot of activity in Bass Strait at present and Bristows will have 3 x AS332L's operating out of Essendon shortly.
There are also A109, BK117 and B222 / B430 operators carrying out IFR marine pilot transfers in Queensland.
Hope that helps,
MPT