Bukkit

Command Signs

Lets you sell a players heads for half of their money

LimitDrops

A light weight virtual chest plugin!

When entering the void your will be teleported back to spawn.

Auto Tree Replanting and Removal

A great expansion for Slimefun.

A better way of storing items.

bPermissions

Nerf those creepers

WarpPortals

A visual and dynamic skill tree API for the easy setup of unique class systems

MobArena

EchoPet - Pets Forever Echoing In Your Footsteps

SimpleClans

Cobblestone generators have a chance to spawn ores!

Add functioning stats to your items to allow players to increase their player stats.

QwickTree

CraftBook adds a number of original gameplay elements to Minecraft from integrated circuits to gates

Run scripts on triggers such as Walk, Click, PlayerDeath, Respawn, BlockBreak & many others. Use Object Variables, IF & ELSE.