I don't think these are particularly new, but, in case you didn't know about them...
This is Bonny, which has a hint of the Celtic about it. Maybe it's the green! There are gold details at bust and hemline too, and for a freebie, it's quite impressive.
There's also the 'free medieval gown'.
Get yours at Madison's Creations.
Skin - Starchild from Felony
Shape - Clarisse from Sophistishapes
Hair - Lee from DrLife