Ion Thrusters

This is a type of propulsion many ships use to maneuver them.

Overview
Ion thrusters are a very common method of propulsion for maneuvering a ship. They work by emitting a trail of charged particles called ions. These help to project the ship in small increments in any direction. They are much stronger and easier to control then Chemical thrusters. However they do tend to consume quite a lot of power. The ions remain in space for a few hours after a ship has used them. This is called an ion trail and it can be used as a sign to show that a ship was somewhere after it has left the location. Despite this it can not show you where it went as these are only used for maneuvering not for traveling fast through space.

Users
Humans - This is legoland primary form of maneuvering as well as many other ships owned by the Galactic Federation

The Droid Alliance - All of the Droids ships use this type of propulsion for maneuvering their ships.

Trivia

 * This is being developed as a real means of propulsion in real life
 * Used by Force 4 on their land speeders
 * General it is a very small engine

Current Status
Used on lots of ships and races as it is reliable and powerful.