Bukkit

The Hidden Lorax will automatically plant saplings left on the ground.

Randomly give zombies that spawn underground a pickaxe.

Slow down skeletons after they fire an arrow

Allows users to both craft and move end portals.

Allows you to toggle whether a player can pickup items.

Allows people to sign in when server is full.

A simple command to summon Primed TNT at someone's location.