Bukkit

Plays sounds when you block breaks

Tired of falling into the void? Void fall stops all that! With more features!

When you play a music on a jukebox, all the players get to hear it!

Infinity Projectiles lets you deactivate gravity on some projectiles!

Troll Filter replaces the sentences with bad words in it with ones that you specify!

MineWeapons adds cool new weapons to Minecraft!

DeathRespawn teleports you to the death location!

Haste Boost lets your users speed up mining with boosts they have cool downs!

Mob Catcher lets you throw eggs at mobs and capture them in spawn eggs!

Drop Inventory lets you drop the full inventory of the target player!

HEALTH CONTROL lets you control every bodies maximum health on the server!

Staff Ask is a plugin so people don't need to see those annoying "Can I have staff messages"!