Bukkit

PvP+ is going inactive for Minecraft 1.2. It was too inefficient to maintain with good conscience, look soon for a new plugin which I'll call Pyraespawn+. I'm currently making it, it will have interesting respawning capabilities.

PvP+ is the successor of my other not very well-known plugin called SimpleRespawn. PvP+ hugely changes the Minecraft system of inventory, respawning, and PvP.

BukkitDev build may not be updated to the latest version.

Recommended update:
In Version 3.3.3 (Saturday, November 26, 2011)
Switched to SuperPerms, see below for nodes.
Updated to the newest version of Factions.

Latest direct build: PvP+ v3.3.3_02 http://dl.dropbox.com/u/34015459/PvP%2B.jar

Respawning:

PvP+ allows you to set a graveyard location (or a Faction-specific one, PvP+ implements factions EXPERIMENTALLY if you set it to do so in the config) where players respawn after dying from PvP, then after waiting a configurable amount of time, they will be teleported back to their death location, like a Res timer; or not at all if the config is set for no respawning.

Inventory:

PvP+ contains an extensive modification of the handling of players inventory. On death, players will no longer drop items, instead they are saved and given back to them when they respawn from the graveyard. This eliminates item stealing in PvP, if you don't like that on your specific server.

PvP:

PvP+ allows you to loot players on death for PvP Rating, by clicking a block in the area near a corpse within six seconds after killing the player. Rewards can be bought depending on your amount of PvP Rating. Dying resets it to 0.

Commands:

/pvp - version info
/pvp setgy - sets universal gy
/pvp setfgy - sets faction-specific gy
/pvp setwgy - sets world-specifig gy
/pvp rewards - shows pvp rewards from config
/pvp refresh - refresh inventory files for the command sender
/pvp refreshall - refresh inventory data files for all players
/pvp updateinventory - forces an inventory update in case something went wrong while respawning and you didn't get your items
/pvp rating - shows your rating
/pvp setrating PlayerName Amount - sets a players rating to an amount
/pvp duel Player Player Arena - starts a duel
/pvp arena new Name - make an arena
/pvp arena delete Name - delete an arena
/pvp arena list - list arenas
/pvp break - break infinite death cycle (Deprecated)
/pvp forceunbreak - unbreak death cycle, if needed (Deprecated)
/pvp team - See the teams you're in
/pvp team new Size - Make a new team
/pvp join - Join a recruiting team
/pvp team list - See all teams
/pvp team delete Size - Delete a team of the size
/pvp team add Size Player - Add a member to your team
/pvp team kick Size Player - Kick a member from your team
/pvp help - Extensive help for all commands!
/pvp buy Item - allows you to buy an item: DEFAULT PvP REWARDS:

diamond (costs 5 kills)
ironsword (costs 8 kills)
diamondsword (costs 12 kills)
food (costs 1 kill)
arrowstack (costs 5 kills)
bow (costs 3 kills)
ironset (costs 15 kills)
diamondset (costs 28 kills)

How to Customize them:

You may add as many custom nodes as you like to the config file, in this format:

pvpRewards:
- ITEM_NAME&price&stackSize

so selling one stack of cobble for 3 points would be:

pvpRewards:
- COBBLESTONE&3&64

video coming not very soon to explain, until then, watch this: http://www.youtube.com/user/NerdyCast#p/u/0/IOWgRdEayY4

Permissions nodes:

Only SuperPerms is supported.

pvpplus.exempt
Player doesn't respawn using the graveyard method.

pvpplus.setrating
Player can use /pvp setrating [name] [amount]

@Deprecated
pvpplus.refresh
Player can use /pvp refresh and /pvp refreshall

pvpplus.setgy.* contains:
pvpplus.setgy.main: Allows /pvp setgy
pvpplus.setgy.world: Allows /pvp setwgy
pvpplus.setgy.faction: Allows /pvp setfgy

pvpplus.team.* contains:
pvpplus.team.delete: Allows player to delete the teams of other players.

pvpplus.arena.* contains:
pvpplus.arena.create: Allows player to create an arena.
pvpplus.arena.delete: Allows player to delete an arena.

Enjoy and leave comments!
Special thanks to inferno04 for the graphics!