Bukkit

Easy to install plugin providing multiple home teleports, with Vault support

Simple Gifts

Gives players money for their experience.

handles pvp matchmaking of various match types

EnchantShops - buy enchantments through signs!

Let's you trade Exp Level with other People ;)

Storing blocks into blocks

Get a reward for killing the EnderDragon!

XPConomy

Just as the name would suggest, it is a basic, easy-to-use economy plugin.

Create payment and tax groups, then pay everyone in them with 1 command.

Guild Plugin delivers a full-featured guild system for Minecraft servers, enabling players to create, manage, and grow their factions.

Plugin that hooks into WorldGuard to provide claimable areas.

EasyTrading

TaxCollector

A plugin, that lets your players to create temporary warps for money!

Advanced magic for Minecraft

Chance-based key-and-chest rewards system

A plugin to buy permissions with signs

Player to Player Trading and Gifting with Economy support