Minecraft Bukkit Plugin: Grappling Hook
No commands necessary.
Pull yourself to locations.
Pull entities to you.
Pull items on the ground to you.
Configurable durability on grappling hooks.
No permissions required. (But are supported)
No configuration required. (But is optional)
Plug and Play.
http://dev.bukkit.org/bukkit-plugins/grappling-hook/pages/api/