Bukkit

Buy Groups and Permissions with Money or Skillpoints

Grenades+

MagicSigns

Let your players hunt epic level bosses and craft powerful items from their remains.

A collection of useful book-related functions

Custom Chat Monitoring and Spam Prevention

The extensible logging framework.

A very powerful Nazi-Zombies type minigame.

Run powerful scripts when a player votes

Permission Manager can handle all your permission nodes!

Allow items to be stored in secure Banks.

Let players advertise their shops and locations to others

Players get extra currency/items once per day!

Anti-Enchant

this is a parkour plugin

A simple but feature-full nicknames plugin that allows you to set other players' nick names

Anti Macro | Kick Players | Fully Customizable | Freeze

AZRank

An easier way to change groups/ranks. [PermissionsEx]

A simple plugin that allows you to create quick customized join / leave messages.