Bukkit

Doors made out of blocks - from the ol'skewl HeyO mod

Add gliders, jet packs, quarries, and much more to your server!

JoinMusic

An advanced vote listener with many features

Automatically promote/rank-up players based on their total online time.

Exploding Projectiles - Rich Configuration - Safe!

Force players to use skins

Define your own join and quit messages with colors, groups and chatnames. (Prefix and Suffix, too!)

Fixes/tweaks to minecraft's building mechanics

mcMMO Levelup reward

Torture other players!

An efficient and comprehensive factions ranking system

A new wardrobe plugin for your hub servers!

All in one economy plugin for Minecraft

SmoothPlot - simple but powerful plots managment system - no pre-defined regions required - WorldGuard based

Ideal permissions/bans/rewards plugin for multiserver environments!

Items react to the blocks below them.

Adds in the commands /tpr, /hub, and /lobby

A fully customizable crates plugin

An easy-to-use potion protection plugin.