Bukkit

Prevents players using/opening blocks/chests they can't see.

Adds 15+ new crafting recipes to your server!

AlternativeCooking

Have more than one spawn point in your world!

An alternate take on death in Minecraft

Fixes negative or giant XP bugs

ChainSaw

Change your skin without client mod !

A simple, light-weight plugin to negate damage. When holding shift there's a chance you roll and take no damage

Improves performance by tweaking mob despawn rules. Say bye to pesky unintentional persistent mobs.

ColorMOTD

Easily add a few extra events to your plugins!

Extension for Bukkit API, adds bunch of methods that make Developer's life easier.

Anti Swear

Get a reward for killing the EnderDragon!

Use golden tools to "smelt" certain block you are trying to mine/destroy.

HungerPlusPlus increases/decreases hunger rate from actions (walking/mining/etc), or gives a steady drain even without moving.

NoAdminKicker

Same Uncrafting Table different Creator

vertically-oriented dispensers and more!