Field Resonance Propulsion
   Postulates magnetic/gravity interactions.
   http://www.keelynet.com/energy/holt1.htm

FuturePropulsion
   An anti-gravity device configured as a dome-topped disk.
   http://futurepropulsion.members.easyspace.com/

Gravitational Propulsion Reseach Group
   Yahoo group for research and theory in alternative science,gravitational propulsion, and time study.
   http://groups.yahoo.com/group/gravitationalpropulsionstevenson/

Gyroscopes As Propulsion Devices
   Gyroscope based technology could provide an alternative form of propulsion.
   http://www.gyro-scope.co.uk/

Quasi Moto: Theoretical Propulsion Physics
   Considers unconventional means of space propulsion (and any ancillary systems), with the aim to determine their feasibility or basis in fact.
   http://www.motordyne.com

Stellarotor / Centrifugal Pulsatory
   A little theory (omniradiation, gravitation, centrifugation as effects of it, dynamic mirrors, ...) and some models as direct derivatives from mechanical vibrators, crank-conn.rod-slider mechanism, eccentric mathematics.
   http://www.geocities.com/iacob_alex/

Theory for Gravitic Propulsion
   A theoretical discussion of using gravity as a means of interstellar space propulsion. Touches on the theories of matter, energy, and space time.
   http://members.shaw.ca/mike.anderton