Bukkit

Vault is a Economy/Permission plugin for hooking into the various Economy and Permission plugins.

A collection of useful commands and features for server admins and players.

EssentialsX

Set up custom villager shopkeepers

Allows server admins to easily modify how Minecraft works without programming anything

The best chest&sign shop system for Bukkit

Another auction house plugin.

Lets you sell a players heads for half of their money

Adds Lotto, Loans, Stocks

LimitDrops

QuickSell

The all in one Shop plugin, With a sexy GUI, Sleek code, and light weight performance!

Multiverse Inventories allows you to control who and what can cross world borders!

Replicate first-person shooters with advanced gun-mechanics and a vast number of exciting and fully customisable features.

Jobs Reborn

Enchant any item with whatever you want, add lore to items, rename items too! UberEnchant has it all!

Unique and challenging custom achievements or quest-like objectives on your server! Books, fancy GUI, rankings, rewards, effects and more!

Get custom items on join.

Commandless, Multi World, Player Owned Shops (Vault)

iConomy - Reloaded!