Translation/Transition mechanisms

We are only using simple transition mechs:
configured v6 over v4 tunneling
but only when the benifit outweighs the overhead much.
esp. for BGP peering.
transport-relay (v6 to v4) translator
to browse IPv4-only web sites from an IPv6-only network.
Perhaps these are enough;
we can even avoid translators when v4NAT is available.
if we really need complicated tools, users may reject the transition.
we may be wrong, of course, but we've been operating our network this way.
No clear image on tools after IPv6 is fully deployed