This plugin is unsupported!!! Use CombatTagPlus instead.

The essential PvP plugin that prevents hit-n-quit players. No longer will the fun of killing other players be ruined!

Combat tag is a plugin that can prevent your players from pvp logging, period.
Reason why we developed this:
When your players are in the heat of battle, sometimes someone gets cold feet, and logs out while in combat!
This means that the player can no longer be harmed, because they are offline.
This can be EXTREMELY irritating to other players, because the person they were attacking, is now safe and keeps all of their items.

How it works:
Combat tag makes it impossible to pvp log!
When a player is struck by another player, combat tag logs it in its log.
If one of the players logs off within 10 seconds (time can be changed) of being struck, combat tag comes to play.
Combat tag makes it so that if the player logs off within the ten second field, he spawns an NPC with the same inventory/health as him.
The player that was attacking then can attack the NPC, and the same is done to the logged off player.
If the player kills the NPC, the player that logged off in combat is also killed, and drops everything in their inventory.
If the player causes damage to the NPC, the player that is logged off also takes the damage (including armor).

Video Demonstration: http://www.youtube.com/watch?v=g4G5MZmHA9A

Video tutorial español: http://www.youtube.com/watch?v=EXLi4vgJ-uc

Video Tutorial italiano: https://www.youtube.com/watch?v=kVixSdjBXvw

Features:

Tracks players in combat
Custom tag time
Supports disabling in specified worlds
Supports disabling commands while in combat
Use /ct or /combattag to keep track of how long until combat is over

How to install:
Everything that is needed for an install should be located here:
http://dev.bukkit.org/server-mods/combat-tag/pages/setup/

Config:
Explanation of the config file options:
http://dev.bukkit.org/server-mods/combat-tag/pages/config-file/

Commands:
There are five commands:
All "ct" can be replaced with "combattag"

/ct = Check your remaining tag time
/ct reload = Reload Combat Tag's configuration file
/ct wipe = Wipes all npcs on the map
/ct command add /<command> = Adds command to blocked commands list
/ct command remove /<command> = Removes command from blocked commands list

Permissions:
There are currently four permission nodes:
Note: Ops automatically get permissions

combattag.ignore = Player does not get tagged and doesn't spawn npcs
combattag.ignore.pvplog = Player does get tagged, but doesn't spawn npcs
combattag.reload = Allow player to reload the Combat Tag configuration file
combattag.wipe = Allow player to wipe all npcs on the map
combattag.command = Allow player to modify disabled commands from in game
combattag.alert = Alert people with this permission of a person logging out while in pvp

Source:
https://github.com/TechzoneMC/CombatTagLegacy/

Problems:
If you have any bugs or feature requests, go here!:
https://github.com/TechzoneMC/CombatTagLegacy/issues

API:
If you wish to use the Combat Tag API:
http://dev.bukkit.org/server-mods/combat-tag/pages/using-the-api/

About Incompatibilities:
As with any plugin where fake players exist, there will be places where other plugins do not take into account the possibility of fake players and may have unexpected results. I can't change how other plugins handle these NPCs, so probably a good bet if you're getting random PvPLogger files is to change the npc name to "player." That way the player and the NPC will share the same files.

Known Incompatibilities:

Heroes in both instakill and NPC mode - No duplication of items, but players will respawn in their old location with the health they logged out at
ModifyWorld - Npcs will not take damage

https://github.com/TechzoneMC/CombatTagLegacy/wiki/Feature-ComparisonFeature Comparison