List of devices vendors and models below. Please add tested models in comments with information about what type of IPv6 connection tested: native, tunnel type supported. Also, if you found a router with difficulties or lack of IPv6 implementation please mention as well to protect people from buying them.

AsusWRT  routers supports “IP v.6” after firmware—“”. – native and tunnels: 6to4, 6in4, 6rd –  DSL-N55U, DSL-N66U, RT-AC66U, RT-N16, RT-N66U (VER.B1)

Draytek Vigor 2762 –  native and tunnels

Draytek Vigor 2862 – native and tunnels

Draytek Vigor 2925 – native and tunnels

Draytek Vigor 2926 – native and tunnels

OpenWRT routers Barrier Breaker and later – native tunnels via packages

IP v.6 Killers

Please be careful with buying TP-Link devices. Firmware can be buggy and you shouldn’t expect updates (I used TP-Link VR600 for over a year and there were not a single update)!!!