Anarchy4all.org has a map that is nearly two months old running on the latest version of the game. It is joinable with every version up from 1.8 .
PvP is always enabled.
The goal is simple. Keep the server running indefinitely with the gameplay being as close to the vanilla experience as possible and to never reset the map.
The map has a standard size of 60 by 60 million blocks.
Also see: r/Anarchy4all