A space technology research laboratory specialized in Electric Propulsion development and testing: Hall thrusters, FEEP systems, MPD thrusters, arcjets.

Research carried out by Stanford University on electric propulsion systems.

Research in electric propulsion, plasma thrusters and fundamental problems in plasma physics. Princeton University.

Research carried out by the Institute of Space Systems. Also contains a good overview of the various types of electric propulsion.

A network for researchers of electrodynamic field propulsion techniques for space travel.

Princeton Plasma Physics Laboratory. This site documents the undergoing research in electric propulsions.

Illustrated tutorial shows how Goodwin's electromagnetic-propulsion system works and how it could send spacecraft deep into space.

General concepts and preliminary design for electrostatic propulsion system with goal of reaching 0.2 to 0.5c for interstellar voyages.

A beginner's overview of ion propulsion.

An advanced plasma propulsion system that will create a large scale magnetic bubble around the spacecraft to ride the solar winds.

One of the 12 advanced technologies that was validated by DS1 during flight.

Use of space tethers for propellantless electrodynamic tether propulsion, pumped tether length propulsion, and transferring energy and momentum from one spacecraft to another.

Researching electric space propulsion with the goal of increased efficiency and better understanding of spacecraft integration issues.

Description of one of the propulsion systems being considered by NASA for a manned Mars mission.

Description of Boeing's commercial XIPS (Xenon Ion Propulsion System). Designed for satellites, but a specialized version of it was used on NASA's Deep Space 1 spacecraft.