Bukkit

Players in creative can 1-hit-kill mobs when crouching

Powerful and lightweight NBT Editor

WorldGuard Extra Flags

AutoRegionGuard

Player created dungeons

Bukkit plugin for automatically refereeing competitive Minecraft matches.

Put commands for certain worlds.

Easily sell worldguard regions to players for currency.

Lag-free world resets, anyone? If resetting is enabled, WR reverts you world folders from backups in a matter of seconds

PvPGames Automated

NoPortals

Set your server spawn as a superior

Game time synchronization with real time.

Reset whole worlds, instantly.

BuildAssist

Control the amount of mobs spawning

makes water and lava flow finitely and discretely

FancyWorld

Grow custom trees !

SetSunny