IPv6 integration to *BSD

IPv6 is on by default on all BSDs
KAME code was integrated into MacOS X, Juniper JunOS, WindRiver (VxWorks), and other vendor routers
if you "ssh localhost", you are already using IPv6:-)

KAME: implement latest Internet technologies/IETF proposals
may not be stable, both implementation/specification POV
*BSD: we selectively integrate portions that became concrete
RFC gets published, protocol number is assigned

If you just want to use IPv6, use plain *BSD (no need to go to ftp.kame.net)
If you are a die-hard Internet researcher, try KAME