Bukkit

A small player voting system

TAEcon

Adds a helpful trade command and GUI to servers

choice of words

Redeem Tokens for stuff!

InvShops

een goede GrayCoins plugin

MineEconomyChatShop - Spend your money on useful items!

Item-for-item Buy Sign / Item Exchange Signs

Sell XP for iConomy-money.

LuckyBar

The members of the server can sell there stuff in here

KitPvP with GUI menu's

Heal Plugin!

GoldEcoPlus

PerWorldTablist is a plugin by only the players are displayed that are in your world. This of course in the TabList

A highly configurable but simple plugin allowing people to sell their goods and receive some money

A lightweight Teleport plugin that costs players to Teleport!

mirccmd

BloodMoney is a simple plugin that allows players to earn money by killing other players.