I've been useing Windowz Eight. I haven't tested IPv6, or tunneling yet. Although PfSense does alright for mem since it now native ipV6 ...
Has anyone heard about Tizen from Intel, It's a distro still in early developement and we welcome any MASTER SAGES

to get involved and get HE.net included into Tizen.
https://developer.tizen.org/ .
Kinda funny how even these new OS are figuring out ipv6 still.. No one really set the standard.