Bukkit

Gain titles from kiling players with a title.

Add permissions to PvP.

PVPvip

A plugin that allows players to disabled PvP for themselves.

Promote your player after they kill a certain number of people!

PVP Logout Equals Death

This plugin randomly creates a maze and has features for managing a pvp match

Changes the gamemode to survival for pvp.

Fixes: PVPLoggers. Put their items in a chest!

Auto Broadcast messages or dispatch commands

Displays the scores from the pvp-stats-plugin in the Minecraft 1.5-Scoreboard.

AfkLimbo teleports AFK players to a safe world without mobs or PVP.

Arenas (PVP arena plugin)

Debuffs players with Slowness who login within 75 blocks of another player to discourage immediate PVP.

PVP - DropTombStone {ALPHA}

Super Arena PvP is an advanced epic battle system capable of it all!!!

Fun 4 team pvp plugin with shop an spawners

Block currently PvP fighting players from accessing WorldGuard regions and given commands (configurable!)

Team based PvP mod

Stops players from using commands to their advantage during pvp.

PVP and PVE Trophy Collection System

Changes the gameplay to a complete PVP opposing two teams, with evolution in time and zones.

A lightweight Deathmatch plugin inspired by Hungergames

Tracks PvP and PvE deaths with customizable messages. Keeps track of stats.

Nerf the new golden apples for pvp