Bukkit

Make it hard to convey your wares

Lobby

Let your players buy Vouchers for commands or other special actions.

Ports

Teleport in style!

JumpBlocks

This very simple plugin prevents players from pvp logging. Players can't use commands while tagged and die if they log!

Multiworld-Manager/-Teleporter

Dracinis

CFBook is a collection of helpful commands to help your server get started.

A very complete, lightweight and updated UltraHardcore plugin

myTeleporter offers warps, homes, spawn with configurable delays. With a simple permission players can use many homes.

Telegion can teleports a player at points choosed randomly in a list.

UltimatePlug

UniversalCommands

Wizards

This plugin allows you to save positions and track the location of players in real time.

eCommands

[Permissions 3.x]

This plugin add a few nice commands.