Bukkit

AdvancedRegionMarket (ARM) allows you to sell, rent and manage WorldGuard regions

Lucky Block Plugin

[Lite Version, Economy, Item Storage, Exp Storage, Highly Configurable]

This plugin provides in-game auctioning functionality for Vault supported economy based servers.

The GTA plugin for Minecraft!

Backpack, ever need extra-storage while you run around? This is the answer to your problems.

CommandRank

A lightweight permission based vault plugin that can store ANY item

All what you need for economy on your server. Money/Shops/Jobs/Towns

Item-based currency / economy plugin

Cooldowns and Warmups for all commands that you wish!

An updated way to earn money for slaying monsters

This plugin enables you to create Signbanks with intrests on the Accounts!

A simple Lottery plugin.

Catch mobs and get Spawn Eggs legitimately!

Allows you to trade with players using the Villager GUI.

Jobs

Per user, per world highly configurable compass mechanics.

Knapsacks are backpacks on steroids. Craft or give knapsacks to players plus many more features!

MySQL or FlatFile Economy Bank System using signs.