Bukkit

Use signs to Rent/Buy/Sell land with Residence.

Brings magic into the world of Minecraft with spells and items

Allows players to buy and sell base items at prices automatically determined by market demand.

ServerShop-gui

RPGplugin

The complete collection of Multitallented's Heroes Skills

SuperPotions

Near 100% customization/control over voting on a server with use of GUI shops.

Automatic inventory switching for groups of worlds - fast, free and simple.

Minetopia ATM plugin

Sync your economy accounts over many servers using MySQL.

PetShop let your user buy any Monster you can imagine

A plugin that adds stores and related commands to Gyul's Economy

Player vs. Monster/Enemy Rewards

Finite Global Shop

Command-based community item sharing with anti-leech karma system

A pretty simple shop plugin. No signs required. Supports DoubleChests and claim protections!

PlayerShop is simple shop plugin

QuickTrade

ILottery - a bukkit plugin that adds lotteries to your server, iConomy support