Bukkit

Function+

High Speed Rails to make minecarts worth building

Road Protector

Small tweaks and addons for Bukkit

Control how long day and night last.

Limits amount of creater spawns via limits set by config

Improve aiming of creatures

This plugin is used to watch the chat of players, manage your worlds and more!

Play Dwarves vs Zombies

Capture Gates and Portals and fight over the right to Portal! Various group and portal plugins supported.

Teleport system with craftable items and blocks, no commands

SignLink

Private Horse

PerWorldChatPlus

An add-on for Chunky which lets you create and manage world borders

Create turrets that automatically track and shoot enemies and mobs!

Craft a jetpack and fly around! Also, solar helmets.

Minecraft block gravity, total physics remake

DigitalClock

Mortars in Minecraft