Bukkit

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

The essential plugin for Spigot servers.

Set up custom villager shopkeepers

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

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

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

The best chest&sign shop system for Bukkit

Inexpensively protects your ores from cheaters.

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

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

This is a easy to use GUI shop plugin.

Get custom items on join.

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

Jobs Reborn

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

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

Commandless, Multi World, Player Owned Shops (Vault)

Another auction house plugin.

Residence

Orebfuscator - Anti Xray